As Keen As Mustard Grafham Water Swimrun Event

JUN
28
2026
Swimrun at Grafham Water on 28 June 2026 offers open-water swims and trail runs with 5k, 10k and 21k options, available for solo competitors and two-person teams, on marked routes around the reservoir.
Sun 28 Jun 2026
Intro Solo Swimrun Sprint Solo Swimrun Half Solo Swimrun Half Team Swimrun

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As Keen As Mustard Grafham Water Swimrun Event

The event takes place on 28 June 2026 at Grafham Water, Marlow Car Park, Huntingdon PE28 0BH. It is a swimrun around the reservoir featuring open-water swims and trail runs through woodland and along reservoir tracks.

Races

  • Intro 5k Solo Swimrun
  • Sprint 10k Solo Swimrun
  • Half 21k Solo Swimrun
  • Half 21k Team Swimrun

Courses are undulating with multiple swim entry and exit points, swims across natural bays, and running around reed-fringed banks. Shorter courses loop back along the north shore. The 21k route completes a full lap of the reservoir and passes through the nature reserve.

Participants must register on race day and attend the mandatory briefing. Trainers or running shoes must be worn for the whole event. Mandatory items include a number band, swim hat for swim sections, a whistle, a waterproof packaged pressure bandage or field dressing, and a soft collapsible cup for aid stations. Wetsuits are mandatory if the water temperature is below 14°C. Random kit checks will be carried out.

Teams comprise two adults who must remain within 100m on land and 10m in the water. Solo entrants must be 18 or over. Cut offs are based on set swim and run paces and are detailed in the Race Handbook. Anglian Water parking charges apply at the venue.

The event operates a zero tolerance litter policy. Photos and film taken during the event may be used for marketing or media purposes. Visit the organization's website for the most recent information.

Half Marathon
Half Solo Swimrun
Half Marathon
Half Team Swimrun
10 km
Sprint Solo Swimrun
5 km
Intro Solo Swimrun
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