
Alkali Creek and Howard Creek define the drainage patterns of this central Montana landscape, where the high plains meet the intricate breaks of Howard Coulee. The topography is characterized by a series of north-south ridges and drainages that reflect the arid, open ranching country typical of the region. Transportation in this area is limited to a sparse network of section-line and connector routes including Flatwillow Rd, Kelly Rd, and Kelley Rd, which provide access to remote agricultural holdings. This 2024 data captures the modern configuration of the border between Petroleum and Musselshell counties, showing how land use and boundary lines remain closely tied to the original Public Land Survey System township and range divisions.
13 named features on this map. Tap any name to fly to it.
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This is the sole edition of this map. No revisions or reprints were ever made.
1954 · Roundup
USGS Topo · 1:250,000
1958 · Roundup
USGS Topo · 1:250,000
1963 · Kelley
USGS Topo · 1:24,000
1963 · Petrolia Lake
USGS Topo · 1:24,000
1963 · Musselshell NW
USGS Topo · 1:24,000
1986 · Flatwillow
USGS Topo · 1:24,000
1986 · Crowley Dam
USGS Topo · 1:24,000
1986 · Big Wall NW
USGS Topo · 1:24,000
1986 · Yellow Water Reservoir
USGS Topo · 1:24,000
1986 · Jim Coulee
USGS Topo · 1:24,000