• Bridgwater Half Marathon and 10k

    Bridgwater Somerset, United Kingdom

    The course for both races is largely flat, with some undulating sections. There’s also a 5k fun run on the same day. Updates are best found on the event Facebook page.

  • Burnham Half Marathon

    Burnham-on-Sea Somerset, United Kingdom

    A very flat road race with personal best potential! This one sold out last year so get in early if you want to race. Visit the Burnham-on-Sea Harriers website to enter.

  • Chippenham Half Marathon

    Chippenham Wiltshire, United Kingdom

    A fast and flat course with roads closed around the centre of Chippenham. Enter now at the official website.

  • Forest of Dean Half Marathon

    Speech House Field Forest of Dean, Gloucestershire, United Kingdom

    Run on forest trails with no road crossings. Visit the official website for info and entry.

  • Swindon Half Marathon

    Coate Water Park Swindon, United Kingdom

    You’ll get 5 miles of flat racing, 5 miles undulating and a downhill finish, all on closed roads. Enter now at the the Run Through website.

  • Quantock Hills Half Marathon

    Kilve Court Bridgwater, Somerset, United Kingdom

    Ancient forests, savage climbs, beautiful views. Sign up now at the Prosper Events website.

  • Cardiff Half Marathon

    Cardiff South Wales, United Kingdom

    Does what it says on the tin. Get the full details at the official website. Entries are via a ballot, so it’s now sold out. Charity entries still available.

  • Cardiff Taff Trail Half Marathon

    Coleg y Cymoedd Cardiff, South Wales, United Kingdom

    Despite its name, this is an ‘out and back’ race run almost entirely on tarmac paths. Visit the Cardiff Running Events website.

  • Stroud Half Marathon

    Stroud Marling School, Gloucestershire, United Kingdom

    A road race described as ‘not flat but still suitable for a fast time’. Organised by Race Nation, full details and entry available at the official event website.

  • The Herepath Half

    Thurlbear Primary School Taunton, Somerset, United Kingdom

    13.7 mile trail run. The Herepath Half route generally follows the Staple Fitzpaine Herepath Trail in the Blackdown Hills. The trail run reaches the highest point in the Blackdowns with […]

  • Cirencester Half Marathon

    Cirencester Gloucestershire, United Kingdom

    Run on country lanes, this doesn’t appear to be a flat course, but should offer some stunning views. Organised by Future Sports Events, you can find out more at the […]

  • Well Run Half and 10k

    Far Peak Northleach, Gloucestershire, United Kingdom

    NEW FOR 2026 – The half is new this year after a few years of the successful 10k race. There’s also 3k & 1k fun run routes. Find out more at the Well Run Race Nation page.