Rock Dunder Nature Reserve is open from May 15th to November 15th each year. You can order a 2026 Season Pass below to have unlimited access for a family in a single car to Rock Dunder from May 15, 2026 – November 15, 2026. Pick up your pass at the Rock Dunder gate on the day of your first hike, between 9:00 AM and 5:00 PM, any day of the week. See you on the trails!