Trail Running calendar near Chalfont Saint Peter 2026-2027

A 5K off-road trail run around Castle Bytham within the Midsummer Festival, running across Lincolnshire countryside with marshals. Dogs on short non-retractable leads are welcome and junior runners may take part with a registered accompanyi..

Experience the twilight beauty of Ardingly Reservoir during this midsummer evening run. Choose between a 5k or 10k distance on a scenic undulating trail featuring a fully stocked aid station and finisher medals for all.

A 5 kilometre muddy obstacle course at The Common in Southampton, with staggered wave starts and a minimum fundraising target. Participants must be 13 or older and receive a fundraising pack and finisher medal.

A grass‑based 5 km obstacle event at The Rutland Showground on 20 June 2026, organised by Cancer Research UK to raise funds for cancer research. The course includes mud and uneven terrain and has a minimum fundraising target of £50.

A 24 hour lap event near Caldecotte Lake in Milton Keynes offering individual and team entries, junior options and camping. Facilities include showers, marquees, free drinks and snacks, with hot food available on site.

Celebrate the longest day at the Summer Solstice Challenge around Abberton Reservoir, a timed loop with 5 km laps. Run as many laps as you like, earn a medal and support Essex Wildlife Trust.

A trail half marathon across the National Trust's Dunstable Downs covering 21.2 km with about 450 m of ascent. The marked route features two aid stations, a four hour time limit, and a limit of 250 runners on 21 June 2026.

Volunteer organised trail races on Horsell Common with family friendly distances from a 2 km kids race to a 21 km option. Proceeds support local charities and the event emphasises minimal environmental impact.

A 10 km trail run at Twisted Tree Brewery on the Tusmore Estate near Bicester. Mostly off-road with a canicross option, chip timing, medal, pint cup and a free drink included.

A community 10 km, 5 km and free junior run around The Moor in Hawkhurst on 21 June 2026. The multi terrain undulating course features finish line cake, a free half pint for finishers and on site stalls.

Circular cross country routes of 26 miles and 18 miles around Baldock across undulating fields and woodland, with checkpoints, refreshments and a certificate for finishers.

Trail races in Trent Country Park, Enfield offering 2 km, 4.5 km and 10 km distances. The senior race is chip timed and run under UKA rules while junior and fun races have additional marshals.

Experience a flat 10k run starting from Shoreham along the scenic Downslink paths toward Bramber. This chip timed event features a halfway aid station and a unique finisher medal for all participants.

A single lap fully off road 10K trail through Panshanger Park on 21 June 2026, passing a 500 year old oak, the Queen’s Wood and the Mimram River. The event includes chip timing, a sustainable finisher’s medal and a Family Fun Run.

A 5k obstacle course at Trinity Park, Ipswich featuring climbs, crawls and slides. Participants must be 13 or older; the course is mainly grass and fairly flat, with on-site parking and basic facilities.

An evening trail race in The Valley, Evesham on 24 June 2026 featuring a two-lap **9km** country park route, canicross permitted, limited places, listed entry fees, and no refunds or transfers for the series.

A twilight trail race at Ashburnham Place with 10k, 5k and a junior run. The event raises funds for four charities and offers on site parking, a bespoke medal and on site food.

Run the Seasons at Cowdray on 26 June 2026 offers 3km and 5km races plus a 10km with dog friendly CaniRun options. The event includes stacking medals, course maps, free photos and an on site BBQ and bar.

Complete three races over three days to achieve a full marathon distance at the Colworth Estate. This multi terrain event in North Bedfordshire offers distances of 5 miles, 8.1 miles, and a half marathon.

A last person standing backyard ultra near Alfriston where runners repeat hourly laps of at least 4.167 miles until only one can start another lap. Limited field, token checks each loop, basic aid station and barn facilities.