Mystery Marathon & Half Marathon : Caldecotte Lake, Milton Keynes
The event consists of a marathon and a half marathon held on 25 June 2026 at the Premier Inn, Lakeside Grove, Caldecotte, Milton Keynes MK7 8HP. Both races use a lake circuit and run clockwise.
Distances
- Marathon - 7½ scenic laps of Caldecotte Lake (clockwise)
- Half Marathon - 3½ scenic laps of Caldecotte Lake (clockwise)
Route details are provided at registration on site. Course navigation will follow the organiser's published route and a route description is issued at the venue. Runners should wear suitable clothing and footwear.
Time limits and results follow strict rules. The marathon has a hard time limit of 7:00 hours; any finisher over 7:00 is recorded as DNF. The half marathon has a time limit of 4:00 hours. The event is held in accordance with 100 Marathon Club rules.
Support on the course includes a starter, timekeeper, race referee, and water and toilet facilities available every lap. Parking is available in a large pub car park. All finishers receive a bespoke medal for that day.
Entry Fees
Entry fees are stated as £39.99 for the marathon and £24.99 for the half marathon. The organiser does not issue refunds; entries can be deferred up to seven days before the event and must be used within 18 months. Visit the organization's website for the most recent information.
Cancellation Policy
As with all event companies we are unable to make refunds under any circumstances. You can defer out of an event up to 7 days before the event date and transfer to another Engima event that isn't closed to entries. Just email us at - [email protected] - with the event you'd like to transfer to. Our current list of events can be found on our home page at www.enigmarunning.co.uk . Deferred entries must be used within 18 months of the original event date.