CamLynn Marathon and Ultra

NOV
7
2026
Flat Fens route from Cambridge to Kings Lynn offering Half, Marathon, 50 mile Ultra, relays and 100 mile option with GPS tracking, aid stations and generous cut offs.
Sat 7 Nov 2026
100 miles 50 miles Marathon Half Marathon

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About the race

The CamLynn Marathon and Ultra is an inaugural multi-distance event along the Fens connecting Cambridge, Ely and Kings Lynn. The route is described as flat and fast and was developed by experienced trail and ultra runners with emphasis on inclusivity and safety.

Available courses include:

  • Half Marathon from Milton to Ely
  • Marathon from Cambridge to the 1st Ely Scouts Hut
  • 50 Mile Ultra finishing on the track at Kings Lynn Lynnsport
  • 50 Mile Pair Relay 26 miles + 24 miles
  • 50 Mile Trio Relay 10 miles + 16 miles + 24 miles
  • 100 Mile Ultra

Event support and services listed for runners include full GPS tracking for all events except the Half Marathon, downloadable maps and GPX files, race bibs, first aid cover, generous aid stations and bag drop. There are free photos, a medal and a participant country flag at the finish, plus an option to send a personal drink to the final aid station. Optional extras are event T shirt and coach transfer to the start from Kings Lynn or Ely; booking details are to be confirmed.

Cut off times are stated as 6.5 hours for the marathon, 14 hours for the 50 mile, and 32 hours for the 100 mile. Minimum age limits vary by course, for example 18 years for the marathon, 21 years for the 50 mile and 23 years for the 100 mile. Visit the organization's website for the most recent information.

100 mi
100 Mile Ultra
50 mi
50 Mile Trio Relay
50 mi
50 Mile Ultra
50 mi
50 Mile Pair Relay
Marathon
Marathon
Half Marathon
Half Marathon

Events nearby

Trail races at Grafham Water offering marked 10k and half marathon routes around the reservoir with water stations, prizes and free digital race photos.
A lap-based timed charity run in St Neots on a 5.3 km out and back course, held in partnership with a local school and the charity KiSS. Multiple distance options are available and Phoenix Running will donate five pounds from each entry to support Ki..
Ely Tri Club Runfest on 18 October 2026 offers multiple distances from 10 km to a 66 km ultra. Routes are mostly flat and traffic free with course maps, on-course food and drink, and a few obstacles such as steps and stiles.
5 km and 10 km races at Grafham Water Visitors Centre on 25 October 2026, run on a flat multi lap route across the dam with camping and charity fundraising options.
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