2020 Map of Lone Tree

About this map

Payette National Forest and Boise National Forest meet along a prominent ridgeline that also serves as the boundary between Adams and Valley counties. The terrain is defined by dramatic elevation changes, dropping from the heights of Mica Ridge and Mica Hill down toward the Lake Cascade shoreline. The hydrologic system is complex, with the Middle Fork Weiser River draining the western slopes while numerous small tributaries like Poison Cr and Little Cr flow eastward. High-altitude features such as Poison Lake, Hubbard Basin, and Burnt Wagon Basin suggest a landscape shaped by seasonal water and traditional movement through the backcountry. A network of specialized roads and trails, including Smokejumper and Johnson Way, provides access to these high basins and the western edge of the reservoir.