Upper Bidwell Park - map it
Almost year round. Some days in the summer it can be too hot or too wet and cold in the winter.
There are a couple trails that start at the east end of the parking lot that take you up to a little peak named Monkey Face. If you take the trail that heads due north you will end up on the Maidu trail. If you look at the peak from here the rocks really look like a monkey. Once on top you have a great view of Horse Shoe lake, Bidwell Golf Course, and all of Chico valley.