US Highway Six is closed over Loveland Pass at this hour after a semi-truck rollover and hazardous materials spill.
The accident happened around 4:30 this morning, not far from the Arapahoe Basin Ski Area.
The Colorado State Patrol says no injuries are reported, and it's not clear exactly what spilled.
Troopers are allowing highway access as far as A-Basin, which still has 100 percent of its terrain open on 59 trails.
Officials aren't sure how long it will take to clean up the mess, but say the road will probably remain closed for some time.