Chiltern Hills 100K
Chesham, United Kingdom • 2 Oct 2027
Chiltern Hills 100K
The Chiltern Hills 100K is a 100 kilometre trail ultra held on an anticlockwise loop through the Chiltern Hills. The route passes landmarks such as the Ashridge Estate, Ivinghoe Beacon to Aldbury on The Ridgeway, Tring Park, Wendover, Coombe Hill, Whiteleaf Hill, Bledlow Ridge, Great Hampden and Great Missenden before returning to Chesham.
The event is based at Chesham Guides Headquarters in Lowndes Park, Chesham, HP5 1HX. The course is fully marked with orange arrows and ribbons. GPS tracking is provided with open tracking and all runners must carry a GPX route on a watch or phone plus a printed map issued at registration. Chip timing, live results and medical support are provided. The race is licensed by the Trail Running Association and held under UKA rules. It has a UTMB World Series index and a maximum field of 250 runners. Minimum entry age is 20 and the time allowed is 19 hours. Total ascent is listed as 1800m plus.
There are six checkpoints, including Hastoe Village Hall (14 km and 41.4 km), Little Gaddesden (28 km), Whiteleaf Hill (57.8 km), Bledlow Ridge Village Hall (75.3 km) and Little Hampden (88 km). Checkpoints offer water, soft drinks, Precision Fuel & Hydration products, gels and chews, snacks, pre-made sandwiches, Chia Charge flapjacks and fresh fruit. Hot drinks and additional water are available at selected points. Runners must carry mandatory safety and clothing items, a reusable cup and basic first aid supplies, and may use a drop bag at Hastoe. Visit the organization's website for the most recent information.