springbum.se

Borås Ultra Marathon

location_on

Gothenburg, Västra Götaland County, Sweden

calendar_today 30 May, 2026

directions_run Running

sell €55.00 – €87.50

About the Event

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.

Races Offered

50 km

May 30, 2026

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Distance — 50K

terrain

Type — Running

timer

11:00

sell

€87.50

21 km

May 30, 2026

straighten

Distance — 21K

terrain

Type — Running

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13:00

sell

€70.00

10 km

May 30, 2026

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Distance — 10K

terrain

Type — Running

timer

14:00

sell

€55.00

Weather History

These values represent the 3-year monthly averages for May in Gothenburg.

thermostat Temperature

7.8° / 17.1°

wb_sunny Feels like

4.5° / 13.9°

light_mode Avg sunshine hours

13h 9m

water_drop Avg rainfall

1.9 mm

ac_unit Avg snowfall

—

air Avg wind speed

12.4 km/h (Gentle breeze)

opacity Sweat loss rate

Low

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (4.2)

humidity_mid Humidity

67.5%

wb_twilight Sunrise

04:47

nightlight Sunset

21:28

About 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.