Search efforts for a missing U.S. Air Force Academy cadet candidate on Longs Peak in Rocky Mountain National Park have been suspended.

Micah Tice, 20, was last seen at about 8 a.m. Nov. 24 by park visitors in the Battle Mountain area, according to park officials.

“The visitors indicated the weather was terrible at the Longs Peak Trailhead and that visibility and weather conditions continued to worsen,” according to a RMNP news release.

Tice was wearing a black sweatshirt, black sweatpants, black hat, black lightweight gloves, tennis shoes and a light blue backpack.

“The visitors discouraged Tice to continue to the summit due to his clothing, footwear and weather conditions,” the release said.

Tice’s vehicle was found at the Longs Peak Trailhead at about 3:30 p.m. Nov. 26. A search of Longs Peak started the next morning.

Over a seven-day search period, ground and aerial teams covered about a 10-square-mile area, park officials said.

Harsh winter conditions, including extreme winds, low visibility, bitter wind chills, below freezing temperatures, deep snow and high avalanche danger, have hampered search efforts.

Ground search teams reached The Ledges section of the Keyhole Route on Nov. 27, but pressed no further because of hazardous, icy conditions on the upper mountain. On Sunday, the first day of optimal weather conditions for flight surveillance, the entire Keyhole Route to the summit of Longs Peak was covered.

“Very few clues have been discovered during search efforts,” the release stated.

A team from the Air Force Academy Mountaineering Club has aided in the search efforts. The Air Force Academy Colorado Parents’ Club has coordinated efforts from numerous organizations and individuals to donate daily meals and support for search team members.

Groups also assisting the Rocky Mountain National Park’s Search and Rescue team are: Larimer County Search and Rescue, Rocky Mountain Rescue based in Boulder County, Colorado Air National Guard, Alpine Rescue Team, Diamond Peaks Ski Patrol, Colorado Avalanche Information Center, Grand County Search and Rescue, Douglas County Search and Rescue, Colorado Search and Rescue Board, Summit County Rescue Group Dog Team and Front Range Rescue Dogs. FLIR Systems Inc. volunteered services to conduct thermal imaging of the search area.

“In the absence of additional clues, active search operations have been suspended,” RMNP said in Tuesday’s news release. Limited search activities, however, may occur during winter months if conditions allow.

Tice is still a missing person and an investigation is ongoing. Park rangers would like to talk with anyone who had contact with Tice in the park, or with anyone who had information on his planned route. Call 970-586-1204.