CHEYENNE, Wyo. (AP) — Dozens of searchers on the ground and two helicopters have so far found no sign of a missing hiker from a well-known Western political family.

Sixty-one-year-old James "Randy" Udall was due to return last Wednesday from a solo hike in the Wind River Range.

Udall is a brother of Colorado Sen. Mark Udall, cousin of New Mexico Sen. Tom Udall, and son of the late Arizona Rep. Morris "Mo" Udall.

Udall left June 20 from a trailhead 10 miles northwest of Pinedale. He was due back last Wednesday. The search for him began Friday, the day he was reported missing.

Searchers say the weather is in Udall's favor. It's been warm, with nighttime temperatures dipping to freezing only at the very highest elevations.