4th Copper Kings 100
4th Copper Kings 100 is a 161 km ultramarathon in Butte, MT, United States, taking place on Jun 26 – Jun 27, 2026. This edition has already taken place.
- Date
- Jun 26 – Jun 27, 2026
- Distance
- 161 km
- Location
- Butte, MT, United States
- Format
- Fixed distance