Gremlins - Marathons & Half Marathons
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Event details
Enigma Running stages a series of marathon and half marathon races at Caldecotte, Milton Keynes on 4–6 December 2026. Each marathon consists of 7½ laps of Caldecotte Lake. Each half marathon consists of 3½ laps of Caldecotte Lake. All events take place from the Premier Inn / Caldecotte area, MK7 8HP.
Distances offered
- Marathon - 7½ laps of Caldecotte Lake
- Half marathon - 3½ laps of Caldecotte Lake
All finishers receive a unique bespoke medal. The events are held under the rules of the 100 Marathon Club.
Logistics and policies
There is a hard time limit of 7:00 hours for each marathon; any marathon finish beyond this time is recorded as a DNF. The half marathon time limit is 4:00 hours. Race support includes a starter, timekeeper and race referee, a large pub car park, and water and toilets provided every lap of the lake course. Runners are asked to wear suitable clothing and footwear.
Entry fees are listed as £39.99 per marathon and £34.99 per half marathon. The organiser does not issue refunds. Entries may be deferred up to seven days before an event and must be used within 18 months. Participants must be 18 years or older and confirm they are medically fit to compete and accept the event terms and risks. Visit the organization's website for the most recent information.
