Opheim Hills and the Dahl Hills define this high prairie landscape in northeastern Montana, characterized by a complex network of drainage coulees and ephemeral water sources. The small, private Floyd Ranch Airport sits along Theony Rd in the northern portion of the map, serving as a rare point of modern infrastructure in an area dominated by cattle ranching and open range. Water is central to the local geography, with isolated landmarks like O'Juel Lake, Dashers Spring, and Georges Pond providing vital resources across the arid terrain. The map records the varied topography of the Big Muddy Creek drainage, tracing the paths of the Middle Fork Porcupine Cr and W Fork Porcupine Cr through a series of named depressions such as Coyote Coulee and Shaw Coulee.
24 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.
1919 · Boundary
USGS Topo · 1:125,000
1954 · Glasgow
USGS Topo · 1:250,000
1957 · Glasgow
USGS Topo · 1:250,000
1958 · Glasgow
USGS Topo · 1:250,000
1973 · Baylor
USGS Topo · 1:24,000
1973 · Opheim
USGS Topo · 1:24,000
1973 · Roanwood
USGS Topo · 1:24,000
1984 · O'Juel Lake
USGS Topo · 1:24,000
1984 · Opheim
USGS Topo · 1:100,000
1984 · Dodge Reservoir
USGS Topo · 1:24,000