An extensive four-day search for a New Hampshire man who had been missing in a notorious range of the Rocky Mountains ended in tragedy earlier this week.

Russell Hardy, 55, set out on a hiking adventure on Pikes Peak, in the front range of the Rockies, after arriving in Colorado on June 10, according to the El Paso County, Colorado Sheriff’s Office. He began his hike the next day, and was meant to return home by June 12, but never did.

Pikes Peak stands at 14,110 feet, making it one of the tallest mountains in the United States.

Russell Hardy, who was found dead near the summit of Pikes Peak in Colorado, stands on the summit of Mt. Washington.  (El Paso County Sheriff’s Office)

Police say foul play is not suspected.

“While there is no indication of foul play, this appears to be a tragic outcome of a man confronting the challenges of nature,” the sheriff’s office said.

“Our deepest condolences are with Mr. Hardy’s family during this difficult time,” said El Paso County Sheriff Joseph Roybal. “Although this is not the outcome anyone hoped for, the dedication shown by everyone involved remains deeply appreciated. Over 100 volunteers from agencies across the Pikes Peak region assisted in the search, braving varying weather conditions and challenging terrain for the mission.

Views of the Pikes Peak sign plate on top of the mountain on Aug. 26, 2015. Pikes Peak is a famous mountain in the Rocky Mountains for hill races and recreation. (Getty Images)

“On behalf of myself and Teller County Sheriff Jason Mikesell, we extend our heartfelt thanks to all deputies, volunteers, rangers, and support personnel who committed themselves to this effort.”

In a Thursday morning release, the El Paso County Sheriff’s Office said the Army Reserve helped recover Hardy’s body.

“At the request of local authorities, Army Reserve aviation assets from Charlie Company, 7–158th General Support Aviation Battalion supported a recovery operation on Pikes Peak,” said Captain Britney Tingstrom of the 11th Expeditionary Combat Aviation Brigade Public Affairs Officer. “The mission was conducted in coordination with the El Paso County Sheriff’s Office and El Paso County Search and Rescue to assist in the safe retrieval of a deceased individual from a remote location. 

The sheriff’s office said it is continuing its investigation and that the county coroner’s office will soon officially confirm Hardy’s identity.