Ready to race? Register directly on the official race website — opens in a new tab.
Register →Save this race to your wishlist, set a registration reminder, and build a full training plan on Trehko.
Greenland Open Space Pack Burro Race presented by Double Rainbow Ranch (8 Mile and 3 Mile) is a road race running event held in Larkspur, CO on Sep 27, 2026. The course has a trail profile.
Trehko tracks registration status, entry fees, and deadlines for Greenland Open Space Pack Burro Race presented by Double Rainbow Ranch (8 Mile and 3 Mile) and thousands of other endurance races. Use the app to set a registration reminder and build a training plan tailored to race day.
Browse by discipline: