
The Diamond Mountains dominate the southern portion of this landscape where the Plumas National Forest boundary meets the high desert of the Honey Lake Valley. This transition between the Sierra Nevada and the Great Basin is marked by steep elevation changes, ranging from the summit at McKesick Peak down to the drainage of Long Valley Cr. The 2021 survey details a complex network of forest and mountain access roads, including Plinco Mine Rd and Doyle Grade, which reflect the area's history of mineral exploration and timber management. Along the western edge, water features like Charles Cr and the Little Last Chance Creek carve through canyons such as Porter Canyon and Downing Canyon. The map also identifies local landmarks like Sugarloaf and Cannon Field, providing a clear look at the topography of the Lassen and Plumas county line.
51 named features on this map. Tap any name to fly to it.
Don’t see what you’re looking for? This feature index may not catch every label — zoom into the map to look around manually.
This is the sole edition of this map. No revisions or reprints were ever made.
1886 · Honey Lake
USGS Topo · 1:250,000
1890 · Sierraville
USGS Topo · 1:125,000
1891 · Honey Lake
USGS Topo · 1:250,000
1892 · Sierraville
USGS Topo · 1:125,000
1893 · Honey Lake
USGS Topo · 1:250,000
1894 · Sierraville
USGS Topo · 1:125,000
1950 · Chilcoot
USGS Topo · 1:62,500
1950 · Portola
USGS Topo · 1:62,500
1950 · Milford
USGS Topo · 1:62,500
1954 · Doyle
USGS Topo · 1:62,500