As visitation to U.S. national parks continues to rise, many parks are implementing timed or ticketed entry systems to help manage crowds and protect delicate ecosystems. In 2025, parks like Arches, Glacier, and Rocky Mountain are requiring reservations for entry during peak season, and knowing when and how to book can make or break your adventure. From timed entry windows to lottery systems, this guide breaks down everything you need to know to secure your spot and enjoy a stress-free trip to some of America's most iconic natural wonders.

Discover the key dates, exclusive fee-free days, and essential strategies for securing your spot in nature. Uncover the reservation requirements for top parks like Arches, Glacier, and Rocky Mountain, and learn expert hacks to navigate the system effortlessly. Don't miss out on your dream park year – read now for a seamless and unforgettable National Park experience!