Hidden Valley is a former ski area in Rocky Mountain National Park. The Ski area and lifts closed in 1991 after operating in one form or another since 1940.
The skinning is fairly casual right out of the parking lot up to the ridge line. There are few steeper sections on the approach, but they are short. There are numerous tree runs from tight to nicely separated. There is also wide open terrain that captures good snow on an upslope storm.
Overall, the skiing in this area is moderate and good for an intermediate skier. The avalanche risk is fairly low due to the low slope angle of most of the terrain, but always be careful.
The Park service built a warming hut/Ranger station at the trail head. It is heated and has bathroom facilities.
Check out Powder Ghost Towns Guide book for further information. Pick up the book at your local backcountry ski store. There is great historical information as well as maps and additional info
How to Get There
After reaching Estes Park, take 36 West to the Beaver Meadows gate Entrance. This will turn into Trail Ridge Road. You will see signs for Hidden Valley. Follow these until reaching the parking lot and ranger station.
Put your skis on and start to skin.
Camping is by permit only due Rocky Mountain National Park restrictions.
Estes Park is filled with touristy places to eat. You can find some great cookies in town too.
There is a National Parks Usage fee. An annual pass is worth getting if you hit the park often