# Protect Duty Marathon Route Planning: A 26.2-Mile Guide

> Plan a Martyn's Law-compliant marathon route with OnePlan. Map risks, manage HVM, and train marshals. Start your Protect Duty plan today.

**Published:** 2026-09-19 | **Updated:** 2026-10-31 | **Author:** oneplansync
**URL:** https://www.oneplan.io/articles/protect-duty-marathon-route-planning
**Type:** post

**Categories:** Event safety and compliance

![Protect Duty Marathon Route Planning: A 26.2-Mile Guide](https://oneplan.sites.aigrowthagent.co/wp-content/uploads/sites/80/2026/09/1788789122414-34ea1cd0bb55-1024x572.webp)

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## Content

*Written by: Paul Foster, Founder, CEO, OnePlan | Last updated: October 28, 2026*

## Key Takeaways

- Marathons with controlled areas expecting 800+ people fall under Enhanced Tier Protect Duty requirements, so the full route must meet compliance obligations.
- Risk zones vary along the course, and bridges, spectator pinch points, and transport hubs each need tailored mitigation that static tools struggle to show clearly.
- Hostile Vehicle Mitigation must cover every vehicle-accessible intersection, with documented barrier placements and a Bill of Quantities ready for SIA review.
- Zone-based invacuation planning, marshal placement, and multi-agency communication form the core of a defensible compliance file that stakeholders can review live.
- OnePlan lets race directors build Protect Duty-compliant marathon route plans with live mapping, crowd capacity calculations, and secure multi-agency sharing in one place.

[See how OnePlan builds a compliant route plan — book a demo](https://www.oneplan.io/book-demo/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent)

## How Martyn’s Law Applies To Marathon Events

The [Home Office statutory guidance](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/terrorism-protection-of-premises-act-2025-statutory-guidance-welsh-accessible) for the Act explicitly names marathons as examples of mixed events that may contain open-access areas alongside access-controlled sections. The key test is whether 800 or more individuals, including staff and volunteers, can reasonably be expected to be present at the same time in a controlled area, and whether entry to that area is checked by payment, ticket, pass, or membership.

Most city marathons meet this test. Start corrals, finish compounds, and major spectator zones typically reach the threshold. Open public-road sections need careful scope analysis in coordination with other responsible persons, including the local authority and police. The [Home Office’s illustrative scope examples](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/non-statutory-supplementary-document-b-scope-illustrative-examples-accessible) confirm that responsibility follows control, so the organisation that controls the premises for the event is the responsible person.

The [Security Industry Authority (SIA)](https://www.legislation.gov.uk/ukpga/2025/10/part/1/crossheading/investigations-and-enforcement/2026-04-10) is the designated regulator. The Act is expected to come into force in spring 2027. The SIA is already running [pilot inspections](https://www.gov.uk/government/news/martyns-law-a-collective-effort) and encouraging organisations in scope to begin preparing now. Further guidance and templates are available at [ProtectUK](https://www.protectuk.police.uk/martyns-law).

**Documentable output:** a scope statement confirming Enhanced Tier qualifying-event status, naming the responsible person and designated senior individual.

## Mapping Risk Along The Marathon Route

A marathon is a 26.2-mile line through urban infrastructure rather than a venue with a perimeter, and risk is not evenly distributed along it. Bridges, transport hubs, narrow underpasses, landmark stretches, and spectator congregation points each create distinct risk zones that need different mitigations.

Static screenshots and spreadsheets can mark these locations on paper. They struggle to show whether a barrier line fits the road width, whether a crowd area remains safe at peak density, or whether an evacuation route stays wide enough under pressure. Engineering-grade CAD software can produce precise drawings. It is expensive, aimed at technical drafters, and slow to update across a changing course.

OnePlan’s base layer is a live, zoomable satellite or street map built on leading GIS technology powered by Esri, so every risk zone appears in its real-world context, to scale. From there, the area calculator outlines any section of the route and instantly returns its dimensions. The standing crowd capacity calculator turns those dimensions into a clear answer on whether a spectator zone is safe at expected attendance, which makes spacing decisions defensible before event day. The [Beirut Marathon](https://www.oneplan.io/case-studies/beirut-marathon/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent), a 49,000-runner race, cut around 20 site visits a year down to just one or two after moving to OnePlan, saving almost a month of planning time.

![aerial shot of a coast filled with software-added event elements. On the left, there is an app menu (OnePlan)](https://cdn.aigrowthmarketer.co/1780508353774-e6397ee8616e.png)**Beach event planning example inside OnePlan: the base layer is a zoomable satellite or street map, and everything placed on it (tents, stages, crowd barriers, toilets, vehicles, staff, signage, routes) stays accurately to scale as you zoom**

General-purpose online map tools can draw a route, but they have no event objects, no crowd capacity calculator, and no Bill of Quantities. Without those, they cannot produce a defensible compliance file.

**Documentable output:** a risk-zoned route map, with each zone labeled by risk level and mitigation type.

[See how to plan road closures under Protect Duty](https://oneplan.io/articles/protect-duty-road-closure-map/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent) for guidance on the highway-authority side of route planning.

[Map your marathon route in OnePlan — book a demo](https://www.oneplan.io/book-demo/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent)

## What Hostile Vehicle Mitigation Means For A Marathon

Once risk zones are mapped, the next step is deciding how to protect them physically. [ProtectUK defines Hostile Vehicle Mitigation (HVM)](https://protectuk.police.uk/advice-and-guidance/risk/hostile-vehicle-mitigation-hvm) as the integrated deployment of security processes, procedures, and physical obstructions to counter vehicle-borne threats. For a marathon, that means identifying every vehicle-accessible intersection, cross-street approach, and service entry along the route where a vehicle could reach a crowd, including cross-streets and service entries well beyond the start and finish.

The UK National Protective Security Authority (NPSA) reports that since 2014, terrorists have used vehicles in more than 140 attacks worldwide. HVM planning must be risk-led. The assessment should consider crowd density, vehicle approach routes, available stand-off distance, pedestrian desire lines, and emergency service access. HVM decisions sit with police, Counter Terrorism Security Advisors, and qualified security specialists. OnePlan’s role is to document the plan they specify, to scale, so it can be reviewed, updated, and shared with every agency.

OnePlan’s [Running pack, launched in 2022, includes over 100 running-specific tools](https://www.runningusa.org/industry-news/oneplan-launches-running-event-planning-solution-to-simplify-planning-races/), including signage and road event tools such as [routes, cones, signs, police locations, and aid stations](https://www.oneplan.io/case-studies/planning-11-running-events-on-the-same-day-how-festfoods-plans-with-oneplan/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent). Crowd barriers and fencing objects are placed to scale on the live map. The auto-generated Bill of Quantities converts every barrier line into an exact segment count, which turns a drawn barrier scheme into a procurement-ready order and a dated record for the SIA. Crowd management expertise should be built into HVM planning from the outset, because physical measures that create pinch points can replace a vehicle-attack risk with new crowd safety risks. OnePlan’s area and capacity tools help planners check that barrier placement does not compromise pedestrian flow.

**With OnePlan, you can place barriers, tents, and more inside its integrated, live planning tool**

**Documentable output:** an HVM and barrier layout with a Bill of Quantities, showing placement at every vehicle-accessible intersection along the route.

## Zoned Perimeters At Start, Finish, And High-Risk Stretches

A linear marathon course benefits from a zoning approach rather than a single perimeter. The start area, finish compound, and any high-risk stretch, such as a bridge, a transport hub, or a narrow landmark corridor, each need their own defined zone with marked entrances, exits, pedestrian crossings, first aid posts, and information points.

OnePlan’s points of interest library provides quick, recognizable icons for all of these. Entrances, exits, crossings, first aid, and information points can be dropped onto the live map without over-building the plan. Zones sit within a single plan, so every agency reviewing the route sees the same picture. Role-based permissions and secure, password-protectable share links mean police, fire, medical teams, and local authority officers all work from one live plan instead of chasing the latest emailed PDF.

**Build your event as a team inside OnePlan: design and manage any physical space on one integrated, live plan**

The [Stadium case study for Coventry Moves](https://www.oneplan.io/case-studies/events-and-safety-how-stadium-managed-traffic-for-one-of-the-uks-biggest-events-in-oneplan/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent), a 12-hour event with 400 road closures across 7 procession routes and 110 stakeholders, shows multi-zone, multi-agency planning in OnePlan at scale. CAD work that previously took a day for eight maps took two hours in OnePlan.

[See the step-by-step Protect Duty site plan guide](https://oneplan.io/articles/protect-duty-site-plan-guide/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent) for detailed guidance on building a zoned plan from scratch.

## Planning Evacuation And Invacuation Along A Race Route

Most published evacuation guidance assumes a bounded venue with a defined perimeter and a small number of exits. A marathon is a 26-mile line with no perimeter, spectators distributed across dozens of locations, and runners spread across the entire course. Standard venue guidance does not translate directly, so race directors need a route-specific approach.

Under the [Act’s public protection procedures](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/terrorism-protection-of-premises-act-2025-statutory-guidance-welsh-accessible), responsible persons must plan for evacuation, invacuation, lockdown, and communication. For a marathon, invacuation may mean moving spectators away from an exposed roadside or external threat into pre-identified hardened or sheltered locations, such as public buildings, transport facilities, or other agreed safe sites along the route.

Zone-based phasing offers a practical method. Planners divide the route into manageable segments, identify invacuation sites within each zone, and mark them on the live plan. OnePlan’s secure view-only links mean police, fire, medical teams, and local authorities can all review the same version of the evacuation and invacuation annex, with no risk of different agencies working from different drafts.

A [road event planner at Pont3](https://www.oneplan.io/case-studies/designing-the-sydney-harbour-10k-road-event-on-oneplan/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent) described OnePlan’s collaborative capability clearly: “The collaborative element of OnePlan is great. It allows for greater team collaboration. OnePlan streamlines our process in a way that we hadn’t realised was possible before.”

**Documentable output:** an evacuation and invacuation annex, with named sites, zone boundaries, and phasing logic marked on the live plan.

[See the Protect Duty emergency access plan template and guide](https://oneplan.io/articles/protect-duty-emergency-access-plan/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent) for supporting documentation on emergency routes.

[Plan evacuation and invacuation zones in OnePlan — book a demo](https://www.oneplan.io/book-demo/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent)

## Marshal And Volunteer Training And Placement

Marshals and volunteers provide the human layer of a marathon’s public protection procedures. Under the Act, staff includes everyone working at a qualifying event, including employees, contractors, and volunteers, and they must be aware of the procedures and competent to deliver them.

The [ACT Awareness e-learning course](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/non-statutory-supplementary-document-c-further-resources-and-learning), delivered free via ProtectUK, covers identifying and responding to suspicious activity, responding to a bomb threat, and responding to a marauding attacker. It suits staff at all levels, including volunteers, and takes around one hour online. [Pendle Council’s Safety Advisory Group](https://pendle.gov.uk/info/20008/licensing_and_law/718/martyns_law_and_event_security_guidance) is already requesting evidence of ACT Awareness completion in event applications ahead of the Act’s commencement. The See, Check and Notify (SCaN) programme from the NPSA provides additional hostile reconnaissance awareness training for marshals in customer-facing roles.

In OnePlan, marshals and volunteers appear as dots on the live map, each with a name, role, shift times, notes, and equipment. Coverage routes are drawn directly on the plan, so every marshal knows their zone and every agency can see the staffing picture. The Bill of Quantities dashboard captures the full staffing inventory for export, which replaces a disconnected spreadsheet with a single, map-linked record.

![Workforce planning example inside OnePlan: the base layer is a zoomable satellite or street map, and everything placed on it (tents, stages, crowd barriers, toilets, vehicles, staff, signage, routes) stays accurately to scale as you zoom](https://cdn.aigrowthmarketer.co/1780620462793-34a56c1c38c8.png)**Workforce planning example inside OnePlan: the base layer is a zoomable satellite or street map, and everything placed on it (tents, stages, crowd barriers, toilets, vehicles, staff, signage, routes) stays accurately to scale as you zoom**

A [2026 systematic review in Public Health Reviews](https://ssph-journal.org/journals/public-health-reviews/articles/10.3389/phrs.2026.1609310/full) found that events with trained marshals had significantly fewer incidents. Inadequate training often leads personnel to react late or lose coordination under stress, which reinforces the case for documented, role-specific briefing materials alongside ACT Awareness completion records. Those records, along with the rest of the route plan, feed directly into the documentation the SIA expects to see.

## SIA Documentation For Marathon Route Compliance

Under [section 7 of the Act](https://logincident.com/glossary/compliance/martyns-law), Enhanced Tier qualifying events must produce a document containing a statement of public protection procedures, an assessment of how those procedures reduce the risk of physical harm, a statement of public protection measures in place or proposed, and an assessment of how those measures reduce vulnerability. A copy must be sent to the SIA as soon as reasonably practicable after preparation, and a revised version must be submitted within 30 days of any revision.

The SIA’s section 7 requirements translate into seven document types, each of which maps to one of the planning stages above:

- A scope statement confirming Enhanced Tier qualifying-event status and naming the responsible person and designated senior individual
- A risk-zoned route map
- An HVM and barrier layout with a Bill of Quantities
- Zoned perimeter plans for start, finish, and high-risk stretches, with marked entrances, exits, crossings, and first aid points
- An evacuation and invacuation annex with named sites and zone-based phasing
- A marshal and volunteer plan with roles, shifts, and coverage routes
- A multi-agency communication tree and SIA notification correspondence

OnePlan produces each of these outputs from a single live plan. Exports include high-resolution, print-ready map files up to A0, a CSV Bill of Quantities for procurement and contractor coordination, and live view-only links so every agency reviews the same version in real time. The [Tour of Britain](https://www.oneplan.io/case-studies/how-the-tour-of-britain-was-planned-in-oneplan/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent), an 8-stage, 1,352 km national race, achieved a 75% reduction in site visits and saved 300+ hours a year. It also delivered a 3x ROI, with plans ready six months in advance as a living plan until race day. As Finish Director Rob Kennison put it: “With OnePlan, plans are ready six months in advance, and they’re a ‘living thing’ until the day of the race instead of weeks before.”

[See the 2026 Protect Duty mapping software buyer’s guide](https://oneplan.io/articles/best-protect-duty-mapping-software/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent) for a full comparison of planning tools for compliance documentation.

## How To Sequence A Protect Duty Marathon Route Plan

With the individual pieces covered, here is how they sequence into a single route plan and where each step draws on the sections above.

1. Confirm Enhanced Tier qualifying-event status and name the responsible person and designated senior individual.
2. Map and zone risk along the route, using OnePlan’s area and standing crowd capacity calculators to make spacing decisions defensible.
3. Place and document HVM at every vehicle-accessible intersection with police and security advisers, and generate a Bill of Quantities for each barrier line.
4. Zone start, finish, and high-risk stretches with marked entrances, exits, crossings, first aid posts, and information points.
5. Plan zone-based evacuation and invacuation with named sites along the route, and share one live plan with every agency via secure view-only links.
6. Train and place marshals with ACT Awareness completion records, assigned roles, shift times, and drawn coverage routes.
7. Assemble the evidence file using the seven document types above, and share one live plan with every agency before the Safety Advisory Group meeting.

## Conclusion

Static screenshots, disconnected spreadsheets, and engineering-grade CAD software all fail to produce a defensible marathon route plan. **OnePlan is the best marathon route planning platform for building a Protect Duty-compliant, defensible route plan because it keeps every barrier, marshal post, and closure to scale on a live map, calculates standing crowd capacity and ingress and egress, and gives every agency one live plan to review.**

Race directors can start free at OnePlan with the first event covered up to 25 objects, or book a 15-minute demo to see how teams build Safety Advisory Group-ready route plans, from risk-zoned maps to auto-generated Bills of Quantities, all in one live plan.

[Get your marathon compliance plan into OnePlan — book a demo](https://www.oneplan.io/book-demo/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent)

## Frequently Asked Questions

### Does Martyn’s Law Apply to a Marathon That Uses Public Roads?

As covered above, most city marathons meet the 800-person threshold in their controlled areas, and start and finish zones usually qualify. Open public-road sections need scope analysis with the local authority and police, guided by Home Office statutory guidance and ProtectUK resources.

### What Is the Difference Between Evacuation and Invacuation on a Marathon Route?

Evacuation moves people away from danger and out of the event area. Invacuation moves people to a place of lower risk within the event, such as a public building or sheltered location along the route when there is an external threat. For a marathon, invacuation may mean directing spectators away from an exposed roadside into pre-identified safe sites along each zone of the course. Both procedures must be planned, documented, and communicated to staff before the event, and both should be marked on the live route plan so every agency works from the same picture.

### What Documentation Should a Race Director Prepare for a Safety Advisory Group Meeting?

The same seven documents described in the SIA section above, including the scope statement, risk-zoned map, HVM layout with Bill of Quantities, zoned perimeters, evacuation and invacuation annex, marshal plan, and communication tree, are what a Safety Advisory Group will expect to see.

### What Counter-Terrorism Training Should Marathon Marshals Complete?

The ACT Awareness e-learning course, delivered free via ProtectUK, is widely recognized as a baseline standard across the UK events sector. It covers identifying and responding to suspicious activity, responding to a bomb threat, and responding to a marauding attacker, and suits staff at all levels including volunteers. Some Safety Advisory Groups, including Pendle Council’s ESAG, are already requesting evidence of ACT Awareness completion in event applications. The See, Check and Notify (SCaN) programme from the National Protective Security Authority provides additional hostile reconnaissance awareness training for customer-facing marshals. Neither course replaces event-specific briefing on local procedures and routes.

### How Does OnePlan Help Race Directors Build a Protect Duty-Compliant Route Plan?

The same live plan, capacity calculator, and Bill of Quantities described above are what make the compliance file defensible. OnePlan keeps every barrier, marshal post, road closure, and crowd zone to scale on a live satellite or street map, and role-based permissions with secure view-only links mean police, fire, medical teams, and local authorities all review one live plan rather than chasing emailed PDFs.

## What to Read Next

- [Protect Duty For Events: A Practical Guide To Martyn’s Law](https://oneplan.io/articles/protect-duty-event-safety/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent)
- [Protect Duty Compliance Requirements: Guide to Martyn’s Law](https://oneplan.io/articles/protect-duty-compliance-requirements/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent)
- [How To Plan Road Closures Under Protect Duty: UK Guide](https://oneplan.io/articles/protect-duty-road-closure-map/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent)
- [Protect Duty Software: Complete Guide To Martyn’s Law Tools](https://oneplan.io/articles/protect-duty-software-guide/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent)
- [Your Complete Guide to Martyn’s Law Compliance](https://oneplan.io/articles/protect-duty-legislation-guide/?utm_term=protect-duty-marathon-route-planning&utm_campaign=ai_growth_agent)

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---

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## Citations

- [PowerPoint Alternatives for Emergency Access Maps](https://www.oneplan.io/articles/best-powerpoint-alternatives-emergency-maps)
- [Canva Alternatives for Emergency Access Planning Maps](https://www.oneplan.io/articles/best-canva-alternatives-emergency-maps)
- [Does Martyn&#8217;s Law Apply in the US? What Venues Face Instead](https://www.oneplan.io/articles/does-martyns-law-apply-us)
- [Martyn&#8217;s Law for Council Events: A Portfolio-Scoping Guide](https://www.oneplan.io/articles/martyns-law-city-council-events)
- [Martyn&#8217;s Law: The Evidence Playbook for UK Venues and Events](https://www.oneplan.io/articles/martyns-law-compliance-guide)

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