The general rule of thumb is that aspens and maples in the Rocky Mountain parks (Yellowstone, Grand Teton, Glacier and Rocky Mountain) typically approach their peak vibrance in mid-to-late September.

To track fall color trends and fine-tune your travel plans to Yellowstone,  check out the Foliage Network for the latest updates. 

Have a wonderful time leaf peeping in Yellowstone this fall! Be sure to check back in with us after you trip to share your leaf-peeping adventures with your fellow park enthusiasts.