Trail Running calendar near Welwyn 2025-2026

We have found 410 Trailruns within 80 miles of Welwyn. See below where and when you can find the races.

Trail running through rolling countryside around Clipston near Market Harborough, with a choice of a half marathon or a 5 mile race. Friendly village atmosphere with on site parking, medals and homemade cake for all finishers.

Run the flat, riverside Ouse Valley routes in Huntingdonshire with marathon and half marathon options on grass, gravel and tarmac paths. Enjoy peaceful river views and fast courses suitable for trail runners of all levels.

Experience the Chiltern 50 from Henley Showground with looped 10 km, 25 km and 50 km trails, scenic climbs and on site camping. Fully supported with aid stations, GPS tracking and a finisher meal with medal and t shirt for all abilities.

UTMB Index

Join the Pumpkin Run at Bullbanks Farm for scenic traffic free courses through pumpkin fields and a playful corn trail. Choose 10K, 5K or a family 1K and enjoy medals, event village fun and autumn vibes.

October 2026

The South Downs 100 mile (Autumn Event) is a challenging single-loop trail race held in the scenic South Downs National Park, starting at Plumpton Racecourse in Lewes, East Sussex. Covering 100 miles with over 12,000 feet of elevation, the..

Run to the Sea Bournemouth is a 50 km ultra on 3 October from Moors Valley to Hengistbury Head via flat forest trails and seafront paths. Fully supported with feed stations, medical cover and a bespoke medal.

Take on the scenic 50 km challenge through Epping Forest in London on 3 October 2026. Enjoy sweeping trails, leafy views and a rewarding long distance test for experienced runners.

Take on 25 km of scenic trails through Epping at the London EcoTrail, an eco focused run that blends challenge with beautiful countryside views. Perfect for trail lovers seeking a green, memorable race day.

Run under the stars on the South Downs at The Dark Downs, a dusk to dark looped event at Plumpton Racecourse offering 50k and Half Marathon distances. Enjoy rolling trails, reflective course markings and volunteer aid stations.

Wild Run Cotswolds at Cornbury Park near Charlbury offers scenic, rolling trail loops from 10K to marathon plus a 360 timed challenge. Family friendly with a supporter zone, marked routes and regular aid stations.

A scenic 20 mile loop from inside Landguard Fort, crossing nature reserves, estuaries and the Port. Marked course with three aid stations and a 6 hour cut off, plus a long sleeve T shirt and medal for finishers.

Enjoy a scenic riverside run on the Thames Meander Autumn on 4 October 2026, a flat and fast towpath course with 10 km, half marathon and marathon options. Well stocked checkpoints and marshals keep you fuelled and supported.

Explore the Surrey Hills on a 30 mile guided group trail run from St Martha's Hill, taking in Denbies, Box Hill and scenic villages. Run together with an experienced coach in a supported, non competitive pace with a cake stop and great view..

Run the Kent Downs Ultra Challenge from a lively Maidstone basecamp with camping, transfers and an on site bar. Choose looped 50 km, 25 km or 10 km routes through the North Downs, past Blue Bell Hill and Leeds Castle for a scenic trail week..

UTMB Index

RunThrough Trails Beat Box Hill offers scenic, hilly trail routes of 21k, 31k and 50k across chalk climbs and woodland with stunning views. Enjoy chip timing, kilometre markers, an event village, themed medal and free photos.

Tackle rolling climbs and sweeping Chiltern views at the Frieth Hilly 10 km and 5 km Run, set on mixed woodland paths and country roads. Expect a scenic but challenging route between Frieth and neighbouring villages.

Run a scenic 13.1 miles from High Lodge through Thetford Forest on a traffic free circular trail of sand, grass and woodland paths. Take in autumn colours and wildlife, then celebrate your finish with a well earned medal.

The Autumn 100 is a 100 mile trail race around Goring and Streatley on the Thames Path and Ridgeway, with about 5,000 ft of climbing and a 28 hour cut off. Aid stations are frequent and pacers may join for the final 25 miles.

UTMB Index

Take on the Gatliff Marathon on 17 October 2026, a scenic 25 km or 50 km challenge through the Kent, Surrey and Sussex countryside. Based at Edenbridge Cricket Club, the event offers checkpoints, food, first aid and hot showers for finisher..

Beachy Head Marathon Weekend offers stunning coastal scenery and a variety of distances across two days, from 10k to ultra. Expect challenging hills, great support from marshals and aid stations, and a memorable autumn race near Eastbourne.