There is an option to earn an annual pass with 20 hours volunteer work.
Free on Wednesdays. A backcountry permit from the visitor center must be obtained to hike or backpack.
WARNING! Hiking and outdoor related sports can be dangerous. Be responsible and prepare for the trip. Study the area you are entering and plan accordingly. Dress for the current and unexpected weather changes. Take plenty of water. Never go alone. Make an itinerary with your plan(s), route(s), destination(s) and expected return time. Give your itinerary to trusted family and/or friends.