Old Station’s Subway Cave: Forest Service Says Lava Tube Is a Seasonal, Unlit Walk

OLD STATION, California — One of the best-known stops near Old Station is not an ordinary aboveground hiking trail. The U.S. Forest Service’s Subway Cave trail guide describes a walk through a volcanic lava tube, with essentially no natural light inside, uneven rock underfoot and a cool interior throughout the year.

The official Lassen National Forest Subway Cave self-guided trail brochure identifies the cave near the junction of highways 44 and 89, about one-quarter mile north of that junction across from Cave Campground. The guide describes a 1,300-foot winding lava tube and a roughly one-third-mile overall walking route.

What to bring and how to prepare

Visitors should use a dependable flashlight rather than assuming a phone screen will adequately light a rocky route. The Forest Service cautions about a rough floor and low ceilings and recommends sturdy shoes. It lists the cave’s temperature at about 46 degrees Fahrenheit throughout the year, making an extra layer practical even when it is warm outside.

These are not minor comfort issues: someone who enters an unlit cave without dependable illumination may be unable to see steps, the ceiling or other walkers. Visitors with mobility limitations should contact the responsible ranger district before planning the trip to determine whether conditions suit their needs.

The seasonal limitation

The Forest Service brochure describes use from approximately late May through October and winter closure outside that period. Because the current date is November 2, the stated normal season has ended. That is a seasonal description, not a verified real-time gate report; contact the agency for access status before setting out.

The brochure identifies the Hat Creek Ranger District as the contact for the area and lists (530) 336-5521. The Old Station visitor information center is a useful local reference point, but operating days and hours vary by season.

The volcano story beneath Old Station

The Forest Service explains that flows from volcanic fissures once spread north through the Hat Creek Valley. The upper rock cooled and hardened while molten lava continued moving underneath. As the liquid lava drained away, empty tubes remained. Subway Cave is one accessible example of that volcanic landscape.

The guide is intended for independent visitors; weather, closure signs and current Forest Service notices always take priority over an old brochure. California58 did not enter the cave or verify its current open status.

Primary source: U.S. Forest Service, Lassen National Forest, Subway Cave Self-guided Trail brochure, checked November 2, 2026.

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