Half Marathons Found
View all ↓Half Marathons 2025 - 2026
Running a good half marathon time is something every runner has on their 'To Do' list. Whether it’s a trail race or a road race, a 13.1 mile half marathon is the natural next step up from 10k, and one of the classic benchmarks to test yourself against. It's long enough to be a true test of fitness, stamina, pacing, form and mental strength but short enough to be within reach of anyone willing to train consistently for a couple of months.
Our database contains everything from small, locally organised half marathons to one of the biggest races on the planet - The Great North Run - which attracts over 50,000 runners and was the first mass participation event on the planet to reach 1 million cumulative participants. The findarace calendar lists over 350 half marathons every year all over the UK and beyond. So whether you’re after a low-key local race or the excitement of a major event, check out our comprehensive 2025 - 2026 calendar below and use the “Refine” button above to fine-tune your search.
Viewing this page in the default “Featured view” will show you all the Best Half Marathons in the UK. If you’re ready to set yourself a challenge right now then switching to “Bookable view” will show you those that can be booked instantly and securely through Find A Race. Guarantee your place today and get training :-)
If you’re ready to book, but not race prepared for the big day, check out our Half marathon kit list to ensure you’ve got everything you need.
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Half Marathons 2025 - 2026
Jones o Gymru Anglesey Half Marathon & 10k
Menai Bridge, GwyneddEssar Chester Half Marathon
Chester, CheshireEdinburgh Marathon Festival - Half Marathon
Edinburgh, MidlothianXTERRA Snowdonia Trail Marathon Eryri, Ultra, Half Marathon & 10k
Caernarfon, GwyneddPHOENIX - Frozen Phoenix
Sunbury on Thames, MiddlesexPHOENIX - Winter Runderland
Sunbury on Thames, MiddlesexFA Cup Run
Milton Keynes, BuckinghamshirePHOENIX - Doughnut Dash
Sunbury on Thames, MiddlesexWTF - Where's The Finish?
Brandon Country Park, IP27 0SUThe Turtle Run
Aberdare, Mid GlamorganPAGAN TRAILS
Newton Abbot, DevonMoors Valley Wildwood Trail Series Half Marathon & 10K
Ringwood, HampshireRun Northumberland Kirkharle Shepherds Trail 10k / Half Marathon & Capability Brown Junior 2k
Newcastle upon Tyne, Tyne and WearThe Hardwick Hobble – Winter 2025 - Day One
Chesterfield, DerbyshireRichmond Park February Winter Warmer 5k, 10k and Half Marathon
London, Greater LondonKingston Break-fest Run 8, 16 & 20mile
Kingston upon Thames, Greater LondonPasty & Pie Challenge - Day 1
Exmouth, DevonPasty & Pie Challenge - Day 2
Exmouth, DevonBrechfa Trail Races
Carmarthen, DyfedRun the Wild Half Marathon - Spring
Tring, HertfordshireKew Gardens Half Marathon 2025
Richmond, Greater LondonMonsal Trail April Half Marathon & 10k (Sunday)
Bakewell Station, Bakewell, Derbyshire, DE45 1GEEastnor Castle Backyard 8hr, Backyard 12hr and Relay
Ledbury, Eastnor, HerefordshireRace to the Base 2025
Assynt Leisure Centre, Lochinver, IV27 4JPBattersea Park Half Marathon
London6 Geese a-laying Run – Virtual
Ross-on-Wye, Herefordshire9 Ladies Dancing – Virtual
Ross-on-Wye, Herefordshire10 Lords a Leaping – Virtual
Ross-on-Wye, HerefordshireHalf Marathon FAQs
How long is a half marathon?
How long is a half marathon?
Half marathon races 21 kilometres, exactly half the distance of a full 26.2 miles. The average finishing time for a half in the UK is around 2:00 hours with more seasoned runners often pushing for 1 hour 30 minutes or less. This makes half marathons the perfect choice for runners looking to step up to a new challenge from 10k races and an important milestone for those on their way to running a full marathon. If you're looking for some inspiration goal setting, find out what a good half marathon time is in our guide.
Can you run a half marathon without training?
Can you run a half marathon without training?
While it is physically possible to run a half marathon without training, we really wouldn’t recommend it. From both an enjoyment and health perspective, training correctly before embarking on a half marathon is going to lead you to have a much better experience.
Running a half marathon requires a significant level of endurance, stamina, and physical fitness. Without proper training, you are more likely to experience discomfort, fatigue, and the risk of injuring yourself is much higher. Training allows your body to adapt, get stronger and build stamina - everything you’ll need to enjoy the challenge of a half marathon race. Diet is also important, for more info take a look at our guide on what to eat before a half marathon.
Alternative Half Marathons
Alternative Half Marathons
Looking for a half marathon you can take part in from anywhere - even indoors? Our virtual runs offer a range of distances and ways to challenge yourself whilst still running solo.
Fancy an active trip away? Check out our Running Holidays page which lists international running trips and breaks.
How many KM is a Half Marathon?
How many KM is a Half Marathon?
A half marathon is equivalent to 21.0975 kilometres (or approximately 13.1 miles). It is exactly half the distance of a full marathon, which is 42.195 kilometres or 26.2 miles.
If I can run a 10k, can I run a half marathon?
If I can run a 10k, can I run a half marathon?
If you can successfully run a 10K (which is approximately 6.2 miles), you can definitely work your way up to running a half marathon. It is roughly twice the distance, so naturally, you’ll need to enhance the stamina and endurance you’ll have already built in running 10 kilometres. Following a structured training plan that allows for rest and increasing distance incrementally is the safest way to build up to the full 13.1 miles.
What types of Half Marathon are there?
What types of Half Marathon are there?
There are two main types of Half Marathon events to participate in: Road Races and Trail Runs.
Road Half Marathons are the most traditional and popular type of half marathon. It takes place on paved roads or streets, typically in city or suburban areas with well-planned routes and water stations. Choose from a range of mass-participation Half Marathon events in London, Manchester, Birmingham and many more big cities and towns across the UK. These types of races also often have fantastic routes that pass iconic landmarks and tend to have buzzing crowds cheering runners on.
Trail Half Marathons are held on off-road trails in woodland settings or on hiking trails. They deliver a more scenic and natural experience but tend to be much more demanding due to the variety of terrain and uneven surfaces.