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Back to Dercum Mountain

Lost Mine

CO

Historical data for the Lost Mine trail at Keystone.

Current Status

Closed

Difficulty

Terrain Park

Section

Dercum Mountain

Status Timeline

Current Season

10/26/20253/27/2026

Prior Seasons

11/14/20244/5/2025
12/18/20234/13/2024
Snowfall(241 days)
Closed(6)
Open(5)
Groomed(1)
Unknown(1)

Recent Changes

Mar 27, 2026, 07:30 AMLatest
Open→Closed
Mar 23, 2026, 06:31 AM
Closed→Open
Mar 19, 2026, 10:31 AM
Open→Closed
Feb 1, 2026, 07:00 AM
Closed→Open
Sep 29, 2025, 02:30 AM
Closed

Statistics

Trail Season Length54 days

Number of Days in Each State

Closed
274 days
Open
50 days
Hold
0 days
Groomed
0 days
Unknown
0 days