Complete Guide to U.S. National Parks with Timed or Ticketed Entry in 2025: How to Plan Your Visit

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.