Closest national parks to Idaho Falls

Layne V. Naylor // Shutterstock   Approximately 323 million people visited American national parks in 2025, a 2.7% year-over-year decrease and the first annual decline since 2020. President Woodrow Wilson in 1916 signed the act creating the National Park Service to leave natural and historic phenomenons “unimpaired for the enjoyment of future generations.” Since then,