Most trailheads and recreation areas in Big Bear Valley require an Adventure Pass. You may purchase one prior to coming up the mountain, or locally at one of the following locations:

• 7–Eleven: 41440 Big Bear Blvd. Big Bear Lake, CA 92315

• Big 5 Sporting Goods: 41385 Big Bear Blvd. Big Bear Lake, CA 92315

• Chirp Nature Center: 40850 Village Dr. Big Bear Lake, CA 92315

More information can be found here.