This is a great place up get away from the city and just experience nature and be overwhelmed by the quiet. Although there were a few distant sounds of airplanes it was so quiet that I only heard the ringing in my ears when all the day trippers had left.
There's an outhouse available but no running water! Be sure to bring water!
Drink plenty of it due to the altitude and don't get dehydrated.
You can cross-country ski here or snowshoe during the winter months. Just check the conditions before you go. Crampons or microspikes are also very helpful if you're going hiking in the snow and ice. The hike up to Mount Pinos is pretty easy without snow and a bit more challenging with. Just be sure you know where you are going because it can be a bit disorientating with the snow covering the trail.