Monarch Mountain, CO, Report: Closing Day Has Come Report from Sunday, March 29, 2026. Monarch Mountain in Colorado closed for the season yesterday, March 29. Record heat waves have ravaged ski areas across the Western United States over the past few weeks. Related: A Look at the Spring Phenomenon of Wiggle Runs Despite this, the independent mountain was able to enjoy a great season lasting 117 days. The […] Conditions Report Logan Tepper | March 31, 2026 0 Comments