James Nelson went missing in the Colorado mountains Friday.
The search for an experienced Chicago hiker who has been missing in Colorado will be suspended Tuesday night.
"The decision to suspend the search for James was very extremely difficult," said Eagle County Sheriff Joe Hoy in a written statement. "Search and rescue teams have scoured all of the terrain that could safely be searched on foot, some of it searched several times, in addition to the extensive aerial search with no results."
Searchers said they will continue to search for clues on Nelson's whereabouts when they are called to the Holy Cross Wilderness Area on other missions.
At an altitude of 9,000 to 14,000 feet, the Holy Cross Wilderness Area is made up of some the most rugged terrain in Colorado. Experts in the field discourage individuals from searching on their own.
Nelson was last seen by two hikers on Oct. 3 while on a a five-day, 25-mile hike of Mount Holy Cross. He was reported missing by his fiancée five days later. Crews began their search on Saturday.