Trail Running calendar near Caldecotte Lake 2026-2027

A 50K trail ultra across the Ridgeway between Berkhamsted Castle and Wendover, with three aid stations, marked navigation and a 9 hour limit.

An inflatable obstacle-course fun run at Donington Park offering 2.5k to 15k distances on a 2.5 km lap, large inflatables, music zones, on-course hydration and finisher medals. Family-friendly with child-to-adult requirements and group disc..

Windsor 50 Ultra Challenge on 17 April 2027 offers 50 km, 25 km and 10 km looped routes from Windsor Racecourse with full support and marked trails.

Guided marathon through the Chiltern Hills with qualified run leaders, checkpoints, and a wooden finisher medal on 17 April 2027.

A scenic 10 km trail race in the Nene Valley, starting and finishing at KC Active in Kings Cliffe with a fully marked circular route and on-course aid station.

Ibstone Circle on 18 April 2027 offers multi-terrain 5 km and 10 km routes through Wormsley Estate plus a Run in Colour for children aged 4 to 11. Fees vary by age and affiliation.

Trail races of 10.4 km, 14.5 km and a 21.1 km half marathon through Elvaston Castle Country Park on woodland, parkland and riverside paths.

A multi-distance canal and riverside ultraseries based at Streatley-on-Thames, featuring TR250, TR150 and TR100 with GPS tracking, checkpoint support and required navigation using provided GPX files and maps.

A family-oriented inflatable obstacle course and fun run in St Albans on 24 April 2027, with 2.5k, 5k, 10k and 15k options, music zones, on-course water and finisher medals. Group, family and charity discounts are offered.

A 13 mile offroad trail race on the Malvern Hills on 24 April 2027, with mapped routes, three aid stations and race HQ at Elim Arts Centre.

Timed laps at Tilgate Park on 24 April 2027 offering distances from 5 km to ultra with medal and no medal entry options.

A multi-distance running event at Pingles Centre, Nuneaton on 24 April 2027 with marathon, half marathon, 10K and 5K plus virtual participation.

A blindfolded navigation challenge in Winchester where participants are dropped at unknown locations and must find their way back on foot. Options include 6 miles for visitors and 10 or 15 miles; no maps or GPS and a sealed emergency bag is..

An alternative to the London Marathon at Walton on Thames featuring a UKA certified 3.28 mile lap. Options include full and half marathon or a seven hour timed event, with a 150 mm finish medal for participants.

Multi-distance road event at Suffolk Running Centre offering 5k, 10k, half and full marathon routes, with aid stations every 10 km and a seven-hour marathon cut off.

A six hour trail event at Beacon Hill Country Park on a 3.3 mile loop where participants complete as many laps as they choose; a head torch is required for laps in darkness.

Out-and-back trail event from Abberley Village Hall with 23, 31, 38 and 47 mile options; the full route includes about 2,941 m ascent, GPX navigation is provided and checkpoints enforce a 13 hour maximum time.

A five mile off road race through woods and farmland around Hurstbourne Tarrant in the North Wessex Downs. Organised entirely by volunteers since 2009, the annual event donates all proceeds to local charities.

A Pretty Muddy 5k obstacle course at Lydiard Park on 01 May 2027 featuring mixed paths, hills and muddy obstacles. The event has wave starts, blue badge parking on grass and a minimum fundraising target of £50.

A 100 mile trail race along the Thames Path from Richmond to Oxford on 1 May 2027, with 1900 ft of climb, a 30 hour cut off and a minimum of twelve aid stations. Entries require a qualifying 50 mile finish within 15 hours.