Trail Running calendar near Hertfordshire 2026-2027

We have found 427 Trailruns within 80 miles of Hertfordshire. See below where and when you can find the races.

Join the Remembrance Run on 8 November 2026 for a scenic timed challenge along the River Thames where you pick your distance from 3 km up to ultra. A two minute silence will be observed and finishers from 3 km receive a medal.

A 50 mile trail race made of five 10 mile loops inside Wendover Woods, with marked trails, nine aid stations, full medical cover and strict qualification and kit requirements. The route includes substantial climb and a 15 hour cut off.

UTMB Index

Multi-terrain 5 km and 10 km races in the Chiltern Hills on 15 November 2026, organised by Radnage C of E Primary School PTA with proceeds to the school. Village hall HQ offers a cafe, water stations and first aid on course.

A 50 km trail race based at Putteridge Bury across North Chiltern ridgelines with several viewpoints, three staffed aid stations and a fully marked route; GPX is available and a mandatory kit list applies.

UTMB Index

A flat trail run along the River Thames from Alexandra Gardens in Berkshire, offered in 21 km and 16 km distances. Finishers receive a medal, a drink, and finisher goodies.

A 10 km race in Kingston on 22 November 2026 that starts and finishes at the Hawker Centre, running through town and along the river towpath. The event uses chip timing, provides a finish medal and refreshments, and offers baggage drop and..

A guided 10 km trail run around the Devil's Punchbowl in Hindhead, Surrey. Evening sessions include sunset runs or night runs by head torch and focus on group pacing, hilly trails, and scenic views.

Trail running in the Suffolk AONB near Wantisden Hall on 28 November 2026 with routes of 9 km, 16 km or 23 km on mostly flat forest and gravel trails. Longer routes have two outposts, and the event offers free parking and timed results.

A trail run in the South Downs National Park starting from Plumpton Racecourse, offering three route distances from 9 km to 21 km with ridge trails, coastal views, and a flat final section to the finish.

Take in riverside views at the Riverside Marathon and Half Marathon in Walton on Thames on 28 November 2026. Flat, UKA certified towpath course, limited places, medals for all finishers and virtual entry available.

Scenic riverside marathon and half marathon on a flat UKA certified towpath from Walton on Thames to Hampton Court and back. Lapped format with finisher medals and virtual entries.

A guided 30 mile trail run from Haslemere along the Serpent Trail and Sussex Border Path, featuring Blackdown, the Temple of the Winds and varied heathland and woodland. Group format with route support and trainer guidance.

December 2026

A hilly trail 10 km through the woodland and parkland of Hughenden Manor near High Wycombe, fully waymarked with a water station at 5.3 km and on-site facilities at the National Trust venue.

A guided trail run on Box Hill that gains about 1000 m over 12.5 miles, featuring technical climbs, scrambling and varied terrain. Group paced for sustained trail running ability with parking at Stepping Stones Car Park.

New winter ultramarathon on 5 December 2026, the St Edmund Way Ultra covers 80 miles across Essex, Suffolk and Norfolk. Expect remote winter terrain, tracker support and strict mandatory kit for a true long distance challenge.

A single loop 55 mile trail race around the South Downs, starting and finishing at Plumpton Racecourse. The route covers grass trails, farm tracks and woodland paths, includes 7,000 ft of ascent and seven aid stations.

A **50 km** trail ultramarathon from Dorking along the Greensand Way into the Surrey Hills, featuring a 5 mile loop and climbs over Leith Hill, Holmbury Hill and Pitch Hill. The route is fully signed, supported and electronically timed.

A seasonal ten mile multi terrain race in Peacehaven with farm tracks, quieter roads and a notable hill around mile six. The event includes fancy dress, recycled finisher medals, charity partners and photos supplied by Sussex Sports Photogr..

A 10 mile loop around Grafham Water starting on the dam, offered as a standard run and a canicross. Scenic reservoir views, woodland trails, finisher medals, on site camping and options for dog friendly entries.

Bauble Bimble is a timed multi-lap running event at Ferry Meadows on a 5.3 km gravel and grass loop. Runners choose how far to go over the event duration, with an aid station each lap and event medals available.