Big Bear's Ultra

About the Event

The Big Bear's Ultra (BBU) is a challenging trail running event set in the mountains of Slovakia, near Žilina, scheduled for September 19, 2026. It is an established race that attracts an international field of runners from over 18 countries. The event offers several demanding distances, including the BBU 100+ and BBU 60+ ultramarathons, as well as shorter races like the BBU 40 and a relay option. It is part of the Europe Trail Cup and the Slovak Ultratrail League, confirming its status as a significant European trail race. The event is known for its stunning mountain scenery, tough courses, and a strong, competitive atmosphere.

Races Offered

BBU Relay

Sep 19, 2026

straighten

Distance — 118K

terrain

Type — —

timer

06:00

BBU100+

Sep 19, 2026

straighten

Distance — 118K

terrain

Type — —

timer

06:00

BBU40

Sep 19, 2026

straighten

Distance — 40K

terrain

Type — —

timer

10:00

BBU60+

Sep 19, 2026

straighten

Distance — 62K

terrain

Type — —

timer

10:00

Weather History

These values represent the 3-year monthly averages for September in Žilina.

thermostat Temperature

11.4° / 21.7°

wb_sunny Feels like

10.5° / 20.9°

light_mode Avg sunshine hours

9h 6m

water_drop Avg rainfall

3.7 mm

ac_unit Avg snowfall

—

air Avg wind speed

7.0 km/h (Light breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (3.5)

humidity_mid Humidity

78.9%

wb_twilight Sunrise

06:21

nightlight Sunset

18:56

About Žilina

Learn more about the host city, Žilina.

Žilina is a town in Central Slovakia with a population of 80,000 (2024) and the capital city of the Žilina self-administrative region. The city itself offers a nice historic centre, which is unique in Slovakia thanks to the arcades on the main square, and a vibrant cultural scene. The surrounding region is a paradise for hiking and skiing, with the Little Fatra mountain range being one of the nature hotspots of the country.