
The Molalla River and its numerous tributaries, including Gribble Cr and Milk Creek, carve through this fertile landscape on the border of Clackamas Co and Marion Co. The terrain is defined by distinct agricultural uplands such as Marks Prairie, Gribble Prairie, and Elliott Prairie, which have long supported small rural communities and family farms. Settlement patterns are visible in the clusters of crossroads hamlets like Macksburg, Needy, Hamricks Corner, and the eponymous Yoder.
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1914 · Oregon City
USGS Topo · 1:62,500
1916 · Tualatin
USGS Topo · 1:62,500
1923 · Mount Angel
USGS Topo · 1:62,500
1939 · Molalla
USGS Topo · 1:62,500
1939 · Oregon City
USGS Topo · 1:62,500
1939 · Tualatin
USGS Topo · 1:62,500
1940 · Tualatin
USGS Topo · 1:62,500
1940 · Molalla
USGS Topo · 1:62,500
1940 · Mount Angel
USGS Topo · 1:62,500
1941 · Oregon City
USGS Topo · 1:62,500