The Half & Half 10K

The Half & Half 10K is a one-of-a-kind two-part 10 km challenge in Calderdale, designed to test both speed and endurance, held on 24 January 2027 with a 10:00 start. Starting from Sowerby Bridge Pool in West Yorkshire, the race takes runners over a bold mix of smooth, fast roads and rough, muddy trails. A relay option is also available.

The 2026 edition introduced the option of choosing your direction: race the first 5 km on tarmac before tackling rough off-road terrain, or reverse the challenge and take on the trails first before a fast finish on the road. The course is fully marked in both directions, so you can focus entirely on your performance.

Limited to just 100 participants, the race leaves plenty of room to run freely and enjoy the atmosphere. Everyone who enters in advance receives a personalised hoodie, a lasting souvenir of a race that blends speed and adventure.