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BOULDER COUNTY, Colo. — A search is ongoing for a missing hiker in Boulder County.

The search began Tuesday after two hikers near the Arapaho Pass Trail and Arapaho Glacier Trail west of Nederland heard a female yelling for help.

The hikers searched the area for a short time, then contacted the Nederland Police Department about 4 p.m.

The Boulder County Sheriff’s Office said there are indications a female was hiking in the area. Her vehicle, a blue Subaru station wagon, was found at the Fourth of July trailhead.

Crews brought in a K-9 team from the Front Range Rescue Dog Team and established a command post along one of the four-wheel drive roads.

Anyone who was hiking in the area at the time is asked to call the sheriff’s office at 303-441-4444.