Ahjumawi Lava Springs State Park in McArthur, California, is nestled in the remote northeastern corner of Shasta County. It is a hidden treasure of volcanic majesty and crystalline springs. Accessible only by boat, this park offers visitors an immersive experience of prehistoric lava flows, Indigenous heritage, and serene spring-fed waterways.
What Makes This Park Unique
The name “Ahjumawi” translates to “where the waters come together,” and it lives up to its name. Multiple freshwater sources—Big Lake, Fall River, Tule River, Ja‑She Creek, and Lava Creek—merge here. They form one of the largest natural spring systems in the United States. Underneath these waters lie rugged lava flows that erupted between 2,000 and 5,000 years ago, creating a dramatic landscape of basalt spatter cones and ancient lava tubes.
This park is truly unique due to its deep connection to the Ahjumawi band of the Pit River Tribe. They have inhabited the area for thousands of years. Visitors can still see bedrock mortars and remnants of ancient fish traps built from lava rocks—some of which are still used seasonally by tribal members.
Top Activities & Amenities
State Park & Camping
Ahjumawi Lava Springs is a California State Park and a true wilderness destination. Camping is available at three primitive, boat-in sites: Ja-She Creek, Crystal Springs, and Horr Pond. These sites offer fire rings and vault toilets but no running water or developed amenities. Camping is first-come, first-served, and self-registration is required at the trailhead.
Hiking
Over 20 miles of trails traverse lava beds, pine forests, and grassy wetlands. The Spatter Cone Trail is a highlight, looping through ancient volcanic formations with sweeping views of Mt. Shasta and Mt. Lassen on clear days. Wildlife sightings are common along the trails, particularly near the marshes.
Fishing, Boating, Kayaking, Canoeing & Swimming
Access to the park is only by non-motorized or electric boat—no roads lead in. Most visitors launch from Rat Farm Boat Launch on Big Lake. The clear waters are ideal for kayaking and canoeing, with calm currents and narrow channels perfect for exploration. Fishing is excellent, especially for trout and bass, in both Big Lake and the connecting waterways. Swimming is possible in some coves, though water temperatures can be cold even in summer.
Wildlife Viewing & Picnicking
The park’s remote and undeveloped nature makes it a haven for wildlife. Watch for river otters, beavers, osprey, bald eagles, and migrating waterfowl. While there are no developed picnic areas, scenic shoreline spots and open meadows make great places to rest and eat.
Restrooms, Showers, and Drinking Water
The park has only vault toilets at designated campsites. There are no showers or drinking water—visitors must pack in all supplies and pack out all waste.
Interpretive Features & Educational Opportunities
Though there is no visitor center, interpretive signs along select trails explain the area’s geologic history and Indigenous heritage. The park does not currently offer ranger-led programs or guided tours, but it remains an outdoor classroom for geology and cultural education.
Practical Visitor Tips
- No road access—reach the park only by boat; launch from Rat Farm Boat Launch near McArthur.
- No fees for entry or camping, but self-registration is required at trailhead kiosks.
- Primitive camping only—no water, trash service, or developed infrastructure.
- Pets are allowed but must be on a leash and under control; use caution around wildlife habitats.
- Vault toilets available at campsites; no showers or potable water—bring everything you need.
- Pack out all trash; Leave No Trace principles are strictly encouraged.
- Use only electric or non-motorized boats; gas-powered vessels are not allowed within park boundaries.
- Wear sturdy shoes—lava terrain is sharp and uneven.
- Cell service is unreliable—download maps in advance.
- Weather can change rapidly; bring layers and sun protection.
Local Insight & Hidden Gem
One of the park’s best-kept secrets is the early morning paddle across Big Lake, where mist floats above the water and the glassy surface reflects the surrounding peaks. For a peaceful lunch break, steer your canoe into Ja-She Creek, where spring-fed pools shimmer over black lava rock. Visit in late spring or early fall for mild weather, fewer mosquitoes, and vibrant bird activity during seasonal migrations.
Ahjumawi Lava Springs State Park isn’t for the casual traveler—it’s for the adventurer at heart. If you’re seeking solitude, unspoiled beauty, and a glimpse into California’s ancient past, this boat-in wilderness promises an unforgettable escape.