| Ahjumawi Lava Springs State Park | |
 Ahjumawi Lava Springs State Park, California USA June 2007 |
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| Location | Shasta County, California |
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| Governing body | California Department of Parks and Recreation |
Ahjumawi Lava Springs State Park is a state park located in Shasta County, California. The state acquired the land from the Horr Ranch in 1975.[1] This park is unique in the California state park system because public access is by boat only. There are 3 campgrounds: Horr Pond, Crystal Springs and Ja-She, each with three primitive campsites, although one site is overgrown from little use. Brilliant aqua bays and tree studded islets only a few yards long dot the shoreline. The size of the park is four miles in length, one mile or less wide and has over 13 mi. of shoreline. At the mouth of the springs, there are remains of Indian fish traps, low rock walls enclosing shallow water that were used to trap sucker and trout by the Ahjumawi.[2] Of the park's 6,000 acres (24 km2), more than two-thirds of the area is covered by recent (two to five thousand years) lava flows including vast areas of jagged black basalt.
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The park can be reached only by boat. There are no public roads to it and private motor vehicles are prohibited within. Visitors can launch into Big Lake at a Pacific Gas & Electric public boat launch known as Rat Farm.
John McArthur purchased land holdings in and around what is now known as McArthur Swamp in 1868. In 1924 PG&E bought the land[2] from the McArthur family to stop water diversions which were hampering the Pit 1 powerhouse downstream, and then leased it to John Masek who built and operated a muskrat farm around 1924. The muskrats were released in the 1930s and have become a concern due to possible environmental damage.[3]
The launch ramp is unpaved and only suitable for shallow-draft boats. The launch site is reached from McArthur by turning north off State Route 299 on to Main St., continuing past the Intermountain Fairgrounds, crossing over McArthur diversion canal and proceeding on a graded dirt road to a junction. Turn right on to Rat Farm road for 3 miles to the launch and parking area.[4]
The Park brochure states "Where the waters come together" is a translation of the word Ahjumawi, which is said to be the self describing word used by the band of Pit River- Achomawi Native Americans who inhabit the area. The Ahjumawi, also spelled (historically) Achomawi and Achumawi; and (more recently) Ajumawi, are one of nine bands comprising the Pit river tribe. The name translates to "River People." Sharon Ellmore, cultural information officer for the Pit River Tribe and the cultural representative for the Ahjumawi band gives a different translation: “My late grandmother, Edna Webster, was one of the elders and she used to say that in our language Ahjumawi means ‘the river people, or the people who live by the river.” [5]
The park and town of McArthur are in the Fall River Valley basin, a large valley bordered on the east and west by mountains and in the north by a volcanic plateau. A series of springs (1.2 billon gallons per day[6]) discharge into the valley from the northern plateau which sustain the lakes and streams that merge in and around the park.
Geologists believe the source of the springs is Tule lake and Klamath lake basins, located fifty miles north. The water then migrates underground through the porous basalt lava, resurfacing in the valley. The waters are Big Lake, Tule River, Ja-She Creek, Lava Creek, and Fall River. Together they form one of the largest systems of fresh water springs in the country.
Preserved within the park are lava flows broken by great faults and deep cracks, lava tubes and craters. The freshwater springs flowing from the lava are prominent along the shoreline.
Oak, pine and juniper forests and slopes of rabbit brush and sagebrush are part of the great variety of vegetation in the area. Abundant wildlife populations are evident all seasons. A great variety of birds including, bald eagles, ospreys, and great blue herons nest or travel through the park. Herds of mule deer forage through much of the park.
Boaters, canoeists and hikers can explore the waterways, pools and lava flows. The park is also an excellent site for wildlife viewing, photography, picnics and overnight camping. Hiking trails vary in length from 1.5 miles (Juniper Trail) to over 5 miles (Lava Springs Trail) showing a variety of volcanic activity such as conic depressions, lava tubes and fields, as well as a spatter cone at the northern end of Spatter Cone Loop Trail. Visitors may be inspired by magnificent vistas of Mount Shasta, Mount Lassen and other nearby peaks.
Higher elevations tend to have much cooler temperatures and
higher precipitation. Summer weather is usually hot and dry with
lower elevation temperatures ranging from 85° - 100°+F and lows
from 60° - 70°. Fall days are usually mild and warm, with cool
nights. Winter is when most of the precipitation falls, averaging
over 55 inches per year, much of it in the form of snow in the high
elevations. Highs range from 40° - 60° and lows from 30° - 40° in
the lower elevations.Spring weather is variable with many pleasant
days. Elevation at McArthur is 3,311 ft.
The park is administered from the nearby McArthur-Burney
Falls Memorial State Park.
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Coordinates: 41°08′10″N 121°25′04″W / 41.1359966°N 121.4177602°W
   | A Interesting, old looking park brochure. - Ahjumawi Lava Spring State Park: Park Brochure |
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