Marc-André Marc Leclerc, 25, and his climbing partner George Ryan Johnson, 34, disappeared after pioneering a new route on the north face of the Mendenhall Towers, about 12 miles from Juneau, Alaska. The last communication was a March 5, 2018 Instagram photo from near the summit of the main tower; they were expected to ski out by March 7 and were reported overdue when they did not return.

Searchers began official operations on March 8 but faced a severe snowstorm and high avalanche risk. Search teams found a cache of ski equipment at the base, an intact anchor rope at the top of an ice chute on the Fourth Tower, and two climbing ropes in a crevasse midway down. Authorities concluded the men had died and called off the active search on March 14, believing the bodies lie in the crevasse; recovery was repeatedly attempted through the summer and fall but was suspended in November 2018 because the area remained too hazardous and inaccessible.

The precise circumstances of their fall are unknown; rockfall or avalanche during descent has been suggested. If anyone has information about the climb, the route, or saw the pair around March 5–7, please share what is known.