SILVER CITY, N.M. (AP) -- A search is ongoing for renowned long-distance runner Micah True, who has gone missing near the rugged wilderness of New Mexico's Gila National Forest.
Authorities say 60-year-old True, who lived in Colorado, went for a run Tuesday morning and didn't return.
True is an accomplished extreme-distance ultrarunner -- taking on distances of 50 miles or more -- who was featured in the bestselling book "Born to Run."
New Mexico state police have been conducting air and ground searches on foot and horseback. There's added concern because temperatures have dipped into the mid-20s on some recent nights.
Officials say the operator of the hotel where True was staying discovered him missing after going to check on his dog. He was last seen wearing running shorts and a T-shirt.