Trail Running calendar near Harwell 2026-2027

A 42km trail marathon from Stanmer Park across the South Downs, including Ditchling Beacon, that joins the Brighton Marathon for the final 6km into Hove Lawns. The off-road route features three feed stations and a mandatory kit list.

Riverside mixed terrain half marathon, 10K and junior race on 10 April 2027 at Remenham Farm in Henley on Thames. Marked kilometres, lap formats vary by distance, and entries include a themed medal and chip timing.

A 54 mile circular ultra from Brixworth Country Park across Northamptonshire trails, towpaths and roads. The event is fully tracked and offers relay teams plus a 26 mile Rosebud Marathon option.

A 50 mile trail race along the South Downs Way from Worthing to Eastbourne, featuring about 5700 ft of climb, seven aid stations, mandatory kit checks and a 13 hour limit. The course finishes with a lap of the athletics track.

Centurion Running's 50 Mile Grand Slam 2027 bundles four separate 50 Mile events across 2027, from April to November. Entries open 26 April 2026 and the standard entry fee is £480.

A county versus county running challenge along the Brampton Valley Way, with runners starting from Market Harborough or Northampton. The 28 mile out and back course features two long tunnels, four feed stations, and field wide county scorin..

Ultra X Spring Trail Series 2027 offers five trail races from 12km to 110km around Cowdrey Estate in the South Downs National Park. Routes pass greensand hills, river, woodland and lowland heath.

A city-centre trail event offering a 55 km ultra and a 25 km trail run through riverside paths, woodland and parts of the old Bristol and Bath Railway. Public parking is nearby and public transport is recommended.

A guided 18 mile trail across the Malvern Hills with over 1300 m of ascent, run at a social pace. Meeting in Great Malvern with parking and nearby train access, cost £39 per person and alcohol free beer may be offered afterwards.

A *50K* trail ultra on the Ridgeway National Trail from Berkhamsted Castle to Hampden Meadow, crossing Ashridge, Ivinghoe Beacon, Coombe Hill and Whiteleaf Hill. Fully marked course with three staffed checkpoints and mandatory route navigat..

A 10k trail race in the Nene Valley countryside starting and finishing at KC Active in Kings Cliffe. The circular route is fully marked and marshalled and includes a staffed aid station.

A multi-terrain running event on 18 April 2027 with 5 km and 10 km courses through Wormsley Estate, a steep Ibstone Kicker, age-specific entry rules and a children’s Run In Colour on Ibstone Common.

A multi-distance riverside series based at Streatley with 250, 150 and 100 mile options. Runners navigate with provided maps and GPX, use GPS tracking and reach checkpoints under strict cutoff times while carrying compulsory safety kit.

A blindfolded navigation challenge from an event centre in Winchester where participants are taken to an unknown location and must find their own way back on foot. Options include a non local 6 mile challenge and 10 or 15 mile routes measur..

Malvern Hills Ultra 2027 is a running event on 1 May 2027 at Abberley Village Hall in Worcestershire offering MHU 47, MHU 38, MHU 31 and MHU 23. Entry fees range from £70 to £95 with additional transport, deferment and transfer options.

Multiple trail race distances in the Stroud area using towpaths, disused railway tracks and Cotswold hills, with a route that ascends to Selsley Common for wide valley views. Water, marshals and first aid are provided on course.

A Star Wars 50th Anniversary weekend on 5 and 6 June 2027 at Caldecotte, Milton Keynes featuring marathon and half marathon races around Caldecotte Lake, unique finisher medals, on-course water and toilets, and time limits for each race.

A point to point half marathon along canal towpaths from Wolverhampton to Brindley Place in Birmingham, featuring a 360 metre tunnel, time trial wave starts and floating drink stations every 3 miles.

A supported ultramarathon in the United Kingdom on 24 and 25 July 2027 offering 100 km and 100 mile options. The event is organised by GB Ultras Ltd and is part of the Ultra Great Britain race series with GPS tracking.

On 4 September 2027 at Remenham Farm, Henley-on-Thames, a mixed-terrain half marathon, 10K and junior race follow a riverbank trail with kilometre markers, chip timing and on-course marshals for guidance.