Chartered as an NSS grotto in 1985, Timberline Grotto is based in the mountains of Western Colorado, and is dedicated to preserving the Value and Resources found within Caves and Karst Systems. The Grotto is a resource for education, exploration, and fun – focused on caves, karst areas, and the creatures that inhabit them.

Timberline Grotto welcomes anyone that has an interest in caves and caving!