ALBUQUERQUE, N.M. (AP) - For Micah True, running - the pure act of running relentlessly and running far - was a passion that needed no justification. To those who knew him well, it also brought forth an intense playfulness in the 58-year-old ultra-marathon runner.

True's body was discovered Saturday evening in a remote part of southern New Mexico's Gila Wilderness. The search began for him days earlier after he failed to return Tuesday from a 12-mile run.

His body was found near a cold stream, his legs still in the water and his water bottle next to him, about a mile southeast of the Gila Cliff Dwellings.

The cause of death wasn't known Sunday. There were no obvious signs of trauma, and State Police Lt. Robert McDonald said it could take a couple of days before authorities know what happened.