Dozens of hikers were trapped by a mudslide on a popular Colorado Rockies trail, and “boulders the size of small refrigerators” blocked a nearby road.

The slide was reported around 2 p.m. Monday during a rainstorm in the area of Bridal Veil Falls, above the town of Telluride.

Within an hour, San Miguel County sheriff’s deputies were directing hikers to a section of open roadway, and more than two dozen people walked out without assistance.

Bridal Veil Falls Trail, Bridal Veil Road, Imogene Pass and the Via Ferrata cliff route were closed as county workers cleared mud and rocks. All were reopened by 10 a.m. Tuesday.

Drones were deployed to search for stranded hikers, including a man who had been seen starting the Via Ferrata around the time the storm hit. An update from the sheriff’s office at 5:45 p.m. said 40 people had safely left the area and nobody was thought to be missing.

On the Via Ferrata, climbers use cables and other fixed hardware to navigate a route along a cliff wall.

In July 2013, a mudslide during heavy rains buried 4 miles of Highway 145 west of Telluride. Twenty vehicles were trapped for more than 12 hours, and it took weeks to clear and repair the roadway.