Trail Running calendar near Harwell 2025-2026

Run the Mendip Marauder, a scenic but hilly trail on the Mendip Way with 30 or 50 mile options that traverse Ebbor Gorge, Cheddar and woodlands before a memorable finish on Uphill Sands Beach. Well marked trails and staffed aid stations sup..

Take on the North Downs Way 100 on 8 August 2026, a continuous 103 miles across Surrey and Kent with about 11,000 ft of climbing and a 30 hour cutoff. Enjoy rolling trails, stocked aid stations and sweeping views from Farnham to Ashford.

Join ATW Odyssey12 at Riverside Park in St Neots for a spirited multi terrain lap run as part of the First to Full Triathlon Festival. Run solo, with a pair, or in a team, enjoy lively spectator zones and earn a unique Odyssey medal.

Take on the 47 mile MTC Windsor Ultra along the River Thames from Henley to Kingston. Enjoy riverside views, checkpoint support and a bespoke finisher medal while you tackle this scenic endurance challenge.

Run a scenic mixed terrain 10 km from Ramsbury Brewery in the Wiltshire countryside on 9 August 2026. Every finisher gets a medal and a beer or non alcoholic drink and a pint cup, with a canicross option available.

Run 100k or 50k around Market Harborough in the Foxton Hound Ultra, with scenic trails through Foxton Locks, Naseby Battlefield and village lanes. Supported aid stations and guided recces make this a classic English ultra challenge.

Run the Southampton Running Festival on 16 August 2026 at Southampton Common with 5K, 10K, half marathon and junior races. Scenic laps through woodland, ponds and parkland, plus an event village and a focus on sustainability.

The Black Bull 15 is a charity trail run held near the Black Bull pub in Chelmsford. It offers two distances: a 15-mile trail route and a 15km option for shorter, faster runs, jogs or walks. The course uses varied trail surfaces through par..

Take on the Henfield Half Marathon for a scenic off road 13.1 mile challenge along riverbank and a disused railway, finishing at Henfield Leisure Centre. Enjoy on site facilities, refreshments and a finishers medal.

Experience the Two Tunnels in Bath, a unique run through two lit, surfaced railway tunnels and rolling paths. Options span short Colourburst runs up to marathon and 50 km distances, with proceeds supporting Sustrans.

Run the Summer Green Man Ultra around Bristol on the Community Forest Path, choose 45 mile or 30 mile clockwise loops, self navigated with checkpoints for water and timing. Expect woodland views, tough terrain and a bespoke finisher medal.

Take on the Woldingham Half or Full Marathon across scenic North Downs ridges, woodland and varied trail terrain with rewarding rolling climbs and countryside views. Finish with a finisher medal, race tee in your goody bag and post race sna..

Run through Alexandra Gardens with views of Windsor Castle at the Windsor Trail Run on 30 August 2026. Choose a 10K or half marathon, enjoy chip timing, free race photos and a lively event village.

Join the Plum 10K on 30 August 2026 in Pershore, a friendly community race hosted by Pershore Plum Plodders. Enjoy a welcoming vibe and strong club support from one of Worcestershire's established running clubs.

Run along the River Thames at Temple Island Meadows with half marathon, 10K and junior races supporting Royal Berks Charity. Enjoy mixed undulating trails, finisher medals, chip timing, free photos and a lively event village.

Take a guided 30 mile run along the dramatic Jurassic Coast, passing Corfe Castle, Kimmeridge Bay and Old Harry Rocks. This hilly, non competitive adventure is ideal for experienced trail runners seeking scenic, supported miles.

Take on the Joust Races 2026, a friendly 24 hour multi lap running challenge at Top Barn Camping with a well marked, mostly flat loop and a lively campsite atmosphere. Enter solo or with a team for a memorable endurance weekend.

Guided 10km evening trail run around Silent Pool, following the North Downs Way through Netley Heath to Shere. Sunset and headtorch night runs are social guided outings not races, ideal for fit trail runners.

Experience the Isle of Wight Fell Race Series in Ventnor on 12 and 13 September 2026, with three scenic, challenging races from a 3.8 km junior climb to a 21 km classic. Organized by Ryde Harriers, the weekend hosts the SEAA Fell Running Ch..

Run or walk the Thames Path Ultra Challenge from Putney to Henley, with distances from a 10 km riverside loop up to the full 100 km ultra. Choose a one day push or a relaxed two day option with midway camping and festival vibes in Henley.