Hike to the Keyhole on Longs Peak in Rocky Mountain National ParkAtmospheric conditions on Longs Peak is capricious. Conditions atop Longs Mountain might fluctuate greatly. It can be vital to check the forecast and be ready for any kind of weather conditions hiking on Longs Peak. The is known for its unexpected climate variations and hazardous storms. Dressing in layers and bringing extra equipment like precipitation jackets, hats, and mittens is critical to be sheltered against inclement weather.