1995 Map of Timbered Crater

About this map

The volcanic landscape of northern California dominates this 1990s study, centered on the prominent Timbered Crater and the surrounding volcanic flows. The map details a complex geological transition where the basaltic terrain of Ahjumawi Lava Springs State Park meets the water-rich Hot Spring Valley. Numerous springs and reservoirs, including Bluebrush Spring, Little Hot Spring, and Green Place Reservoir, highlight how water is managed and sourced within this arid, lava-scarred environment. Mapping of the area reveals a wilderness defined by its past eruptions, with landmarks like Brushy Butte and various Lava fields. The convergence of three counties—Siskiyou, Modoc, and Shasta—occurs within these borders, showing how administrative boundaries were drawn across the rugged Cascades foothills and through portions of the Shasta National Forest.