SALIDA, Colo. -- Remains discovered Monday in Chaffee County, Colorado, may be those of a missing Cleveland-area man.

Gene George, 64, was last heard from Sept. 18 when he spoke by phone with his girlfriend in Cleveland. He was reported missing when he failed to check out of his hotel room four days later.

His car was discovered parked and locked at the North Cottonwood Creek Trailhead.

On Sunday, hiker Karl Maes, 20, of Colorado Springs notified sheriff's deputies he had found a wallet and clothing.

Monday morning search volunteers assembled and, accompanied by Maes, found the remains.

The discovery was found in very rugged terrain marked by thick underbrush a quarter mile off the trail leading to the summits of Mount Harvard and Mount Columbia. This is about 2½ miles from the North Cottonwood Creek Trailhead.

When George went missing, a four-day search involving more than 100 volunteers from seven counties, three helicopters, a fixed-wing aircraft, several dog teams, two horseback teams, two mules and other specialized equipment was convened.

The remains were released to the Chaffee County coroner for examination to determine cause and manner of death.