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(1,541 ft/470 m). Named for the pale blue-gray portions of the ceiling inside the "Blue Grotto". The ceilings are high throughout this cave but the floors are rough.
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(1,405 ft/428 m). Named for the rich brown color of lava coating the ceiling and walls. Stooping is required in a couple places, and there is one passage with a ceiling height of 3 ft (0.9 m) that requires duck-walking.
(3,280 ft/1,000 m). This cave's easy main trail requires no stooping or ducking, and has lots of interesting features. This is one of the only developed caves with two entrances.
(6,903 ft/2,104 m). This very long cave is easily entered but gradually increases in difficulty. It is possible to walk upright for approximately 800 ft (244 m) to the stairway, after which the ceiling rarely exceeds 3 ft (0.9 m). A few places exist where the ceiling height is less than 12 in (30 cm). A cave map is highly recommended for any group planning to explore the entire length, as multiple levels and numerous side passages can be confusing. This cave is not recommended for inexperienced cavers.
(2,229 ft/679 m). Beware of "headache rock" when entering and exiting the cave via the ladder. The downstream portion of this cave (heading north) is the easier route but still requires some stooping. The back section where the "Golden Dome" is located is a figure-8; take note of your location so you don't go around in circles. The golden ceiling in this and many other Lava Beds caves is the result of light reflecting off water droplets that bead up on a coating of hydrophobic bacteria. The bacteria are not harmful to humans but are protected, so please do not touch. The upstream portions of this cave are more difficult and require more stooping and some crawling.
(1,033 ft/315 m). Upstream section of the Catacombs tube system, separated into individual caves by a series of collapse trenches. Smooth floors and ceiling heights exceeding 7 ft (2 m) are found throughout this cave.
(216 ft/66 m). This large cave contained 36 bighorn skulls when it was discovered in the 1890s. Ceiling heights exceed 25 ft (7.6 m), and some outside light is visible throughout. Ovis and Paradise Alleys are adjacent caves; you can enter in one and return via the other.