Spring Cave
Meeker, Colorado
23.3 miles SE of Meeker, ColoradoLocated in Colorado in the White River National Forest, in the South Fork Valley of the White River, Spring Cave is a large, not completely explored cave that has been largely cut out by an underground river running through it. It contains a lake several hundred meters inside as well as several caverns only accessible through underwater diving. The cave is free to explore.
Hubbards Cave
Glenwood Springs, Colorado
5.5 miles E of Glenwood Springs, ColoradoThis trail is generally accessible from April to October. It's 9 miles each way. The trail is used by ATVs, mountain bikers, and hikers.
This road takes you to the Hubbard Cave trail. Hike the trail for 1/4 mile to the cave entrance. Hubbard Cave has approximately 3,000 feet of passage with a vertical relief of only 50 feet. It was probably formed by erosion from a stream derived from groundwater in the lower beds of Leadville limestone and Dyer dolomite. Remember cave features are protected by law. Help preserve this natural wonder for future generations to enjoy.
The cave is a rectangular network of three parallel passages, each with its own entrance. There are large quantities of cave coral, but it is mostly restricted to the upper level.
The Grape Room, deep in the cave, has unusual small, rounded botryoid formations. The Gypsum room has a large concentration of gypsum flowers, gypsum blisters, selenite needles and angel's hair.
Courtesy of https://fs.usda.gov