2021 Map of Riley
USGS Topo · Published 2021About this map
Agricultural lands at the borders of Boone, McHenry, and DeKalb counties define this rural landscape near Marengo. The terrain is shaped by the subtle drainages of Coon Cr and Spring Cr, which meander through a grid of section lines and country roads. Transportation and aviation are prominent features of the area, evidenced by the presence of several private airstrips including Walpole Airport, Wind Rose Farm Airport, and the Idlas RLA Airport further south.
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Map Details
Editions of this 2021 Riley Map
This is the sole edition of this map. No revisions or reprints were ever made.
Other maps of this area
1918 · Belvidere
USGS Topo · 1:62,500
1918 · Kirkland
USGS Topo · 1:62,500
1932 · Harvard
USGS Topo · 1:48,000
1937 · Harvard
USGS Topo · 1:62,500
1938 · Genoa
USGS Topo · 1:62,500
1944 · Belvidere
USGS Topo · 1:62,500
1954 · Rockford
USGS Topo · 1:250,000
1955 · Rockford
USGS Topo · 1:250,000
1958 · Rockford
USGS Topo · 1:250,000
1963 · Rockford
USGS Topo · 1:250,000