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The Eagle Lake Field Station is located 26 miles northwest of Susanville, Lassen County, California, about 100 miles south of Oregon, 40 miles west of Nevada, and 300 miles northeast of San Francisco. California Routes 36 and 44 from the west and 395 from the north and south lead to Susanville. Eagle Lake can be reached by paved road (County road A-1), but the field station is at the end of 10 miles of dirt roads. The recommended route is to take Rt. 139 north from Susanville for 16 miles, turn left at the field station sign and follow the ELFS signs. The dirt roads are rough and rocky; 4-wheel drive is rarely necessary but a high-clearance vehicle is recommended. The field station itself is sited on 80 acres on the middle eastern shore of the lake. The land accessible to students and faculty is much greater - literally thousands of acres. The station is located within a sage / juniper woodland, but a variety of habitats (marshes, lakes, streams, montane coniferous forests, high desert) are very close by. Temperatures are typical for the eastern side of the Cascades with highs in the 90s and lows in the 50s during the summer months. Winters are cold, down to 0 degrees, and the lake freezes over regularly. Both rainfall and snow are moderate as the station is in the rain shadow of the Cascades.


Eagle Lake


Eagle Lake, the second largest freshwater lake entirely within the boundaries of California, lies in an isolated valley on the eastern side of the Cascade range. The remnant of a much larger Pleistocene lake, Eagle Lake covers about 30,000 acres and is nearly 14 miles long. Located at the juncture of four major geologic provinces, it is bordered on the west by the forested slopes of the Cascades, on the South by the Sierra Nevadas, on the east by the arid Great Basin Desert, and to the north and east by the Modoc Plateau. The terrain immediately around the lake ranges from the surface of the water at 5100 feet to the 8000 foot elevation of Fredonyer Peak to the northeast. The lake's geologic diversity provides for a unique set of ecological communities. Montane coniferous forests become interspersed with western juniper and mountain mahogany which give way to sage and rabbit brush to the east. The high pH of Eagle Lake (near 9) allows only 5 species of native fishes to thrive including the prized Eagle Lake subspecies of the rainbow trout. But the lake is quite productive with moderate numbers of invertebrates and fish eating birds. Volcanic ice caves on the west side of the lake support populations of cave crickets as well as other cave biota, and the lake supports one of California's largest breeding populations of western grebes.




The field station may be used by any public or private group whose primary purpose is educational and whose activities are consonant with the natural environment. College classes, high school groups, consulting firms, and government agencies have all used the field station, but the vast majority of its use has been by university natural science and archaeology classes. Biology, geology, chemistry, soil science, zooarchaeology and many other ecological courses have been offered there.




The Eagle Lake area is fairly isolated and the field station is located in a remote area that sees little activity. Although there has been a lot of student and faculty research over the years, published data is scarce and baseline information is needed. This large mesotrophic lake lies at the juncture of several different geologic provinces offering exciting research potential in many areas of natural science and archaeology.



There are several buildings including cabins, dormitories, a kitchen/dining hall, library, conference center, and a five room laboratory as well as utility buildings. Some scientific equipment is available, but much more is available through the main campus and transported up as needed. Small biological reference collections of local Eagle Lake vertebrates and invertebrates are also curated on site. Several boats are available for both scientific and recreational use. The station has no public telephone, but the Steward/Cook’s cabin is equipped with a phone in case of emergency.Groups of up to 40 can be accommodated comfortably, and the usage fee covers usage of most field station facilities, equipment, and supplies.


Information and Facilities Reservations


For additional information and to reserve facilities at the Eagle Lake Field Station, please contact:


Randy Miller
Department of Biological Sciences
California State University,
Chico, California 95929-0515

Office Phone: (530) 898-5359
FAX: (530) 898-5234