Top Gun Run
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Mystery Box Marathon and Half Marathon, Milton Keynes
The Mystery Box Marathon and Mystery Box Half Marathon take place on 12th November 2026 at Premier Inn, Lakeside Grove, Bletcham Way, Caldecotte, Milton Keynes MK7 8HP.
The events use laps of Caldecotte Lake in a clockwise direction:
- Marathon - 7½ clockwise laps of Caldecotte Lake
- Half Marathon - 3½ clockwise laps of Caldecotte Lake
Route details are provided at the event location and mandatory race briefings are held on site. The marathon has a hard time limit of 7 hours; anyone finishing over 7:00 will be recorded as a DNF. The half marathon has a 4 hour time limit.
Race support includes a starter, a timekeeper and a race referee. A large pub car park is available, and water and toilets are provided on every lap of the lake course. Finishers receive a unique bespoke medal.
The event is held in accordance with 100 Marathon Club rules. Participants must wear suitable clothing and footwear. Entry fees are £39.99 for the marathon and £34.99 for the half marathon.
There are no refunds. Deferred entries can be transferred up to seven days before the event and must be used within 18 months. Entrants must be 18 years or over on the day, confirm they are medically fit to compete, and accept the risks of participation. Visit the organization's website for the most recent information.
