Borås Ultramaraton (BUM) takes place on 30 May 2026 in Borås, Sweden, organized by SOK Knallen. This scenic and challenging race offers three distances: 50 km, 21 km, and 10 km, on a course consisting mostly of gravel roads and trails with beautiful natural surroundings. Registration is open until 25 May 2026.
| Distance | Start Time | Elevation Gain | Course Surface | Aid Stations | GPX Available | Entry Fee (SEK) |
|---|---|---|---|---|---|---|
| 50 km | 11:00 | Not specified | Gravel roads and trails | Multiple | Yes | 950 kr |
| 21 km | 13:00 | Not specified | Gravel roads and trails | Multiple | Yes | 750 kr |
| 10 km | 14:00 | 285 m | Gravel roads and trails | Water and sports drink at 3.5 km and 7 km | Yes (GPX available) | 600 kr |
The course is naturally scenic, challenging, and hilly, taking runners from built-up areas to beautiful forest paths. Prepare for every kilometer as you explore the routes through Borås' varied landscapes. The 10 km course is a beautiful loop mostly on gravel roads and trails.
After crossing the finish line, the famous After Run awaits. Take off sweaty running clothes, enjoy a much-needed shower and sauna, and refuel with more than just sports drink. A vegan goulash is served for all hungry runners. All finishers receive a well-deserved medal. Take a shower, bathe in the wood-fired sauna, and enjoy a refreshing dip in Lake Kypesjön.
Whether beginner or ultrarunner, there is a distance for you. Join the most energetic running event of the year—challenge yourself, beat your records, and feel the energy.
May 30, 2026
Distance — 50K
Type — Running
11:00
€87.50
May 30, 2026
Distance — 21K
Type — Running
13:00
€70.00
May 30, 2026
Distance — 10K
Type — Running
14:00
€55.00
These values represent the 3-year monthly averages for May in Gothenburg.
Learn more about the host city, Gothenburg.
Gothenburg is Sweden's second largest city with 600,000 inhabitants, and about 1 million in the metropolitan area. The city lies on Sweden's west coast, at the outlet of the Göta river. Gothenburg is Sweden's largest industrial city with companies such as the Volvo Group and Volvo Cars, as well as Scandinavia's largest port. The city hosts numerous national and international sporting and music events such as Gothia Cup, Partille Cup and Way out West. Gothenburg also has the Sweden's largest amusement park, Liseberg.
Read more launchWatch highlights and course previews from previous years.
Read what other athletes have to say about their experience at the Borås Ultra Marathon.
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Explore other exciting events happening in this same region.
location_on Gothenburg, Västra Götaland County, SE
calendar_today May 23, 2026
location_on Gothenburg, Västra Götaland County, SE
calendar_today May 23, 2026
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