Enigma Week at the Knees
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Event overview
Enigma Week At the Knees 2026 runs from Monday 9 March to Sunday 15 March 2026. The event comprises seven separate marathons, one held on each day. Days 1 to 3 take place at Willen Lake, Lakeside Bar & Grill, Willen Lakeside Park, Milton Keynes MK15 9HQ. Days 4 to 7 are at Caldecotte Lake, Premier Inn, Bletcham Way, Milton Keynes MK7 8HP. Day four is run anti-clockwise; days five, six and seven are run clockwise.
Race details and support
Each marathon is run on a lap course. A water, nibbles and aid station is available every lap. A starter, timekeeper and race referee are provided. Large pub parking is used; parking at Willen is pay and display and parking at Caldecotte is free. A route description is given at the location. Mandatory race briefings take place ten minutes before each race and registration opens thirty minutes before each race. Runners are required to wear suitable clothing and footwear.
Limits, awards and entry
There is a hard time limit of 7:00 hours for each marathon; finishers over this limit are recorded as DNF. A unique bespoke medal is awarded each day and participants who complete all seven days receive a 183.4 mile finishers medal. Entry is priced at £39.99 per individual day or £265.00 for all seven days. The event is held in accordance with 100 Marathon Club rules. No refunds are offered; entries may 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.
