Surprise Valley defines the western edge of this Modoc County landscape, where the basin floor meets the high desert terrain of the Warner Mountains. The area is marked by geothermal and hydrological features, most notably Leonards Hot Springs and the expansive northern reaches of Middle Alkali Lake. These waters have historically been vital for settlement and livestock in this arid region, where drainages like Sand Cr and Fortynine Cr cut through the high ground.
17 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 · Alturas
USGS Topo · 1:250,000
1889 · Long Valley
USGS Topo · 1:250,000
1892 · Alturas
USGS Topo · 1:250,000
1954 · Vya
USGS Topo · 1:250,000
1954 · Alturas
USGS Topo · 1:250,000
1958 · Alturas
USGS Topo · 1:250,000
1958 · Vya
USGS Topo · 1:250,000
1962 · Alturas
USGS Topo · 1:250,000
1962 · Vya
USGS Topo · 1:250,000
1962 · Cedarville
USGS Topo · 1:62,500