The Pudding River is a tributary of the Molalla River in the U.S. state of Oregon. Its headwaters are near Sweet Spring Mountain in the Cascade Range. After emerging from the Cascades, it becomes a slow meandering stream, passing through a region of fertile agricultural lands in the lower Willamette Valley. Two forks of the Pudding join between the cities of Silverton and Mt. Angel, at the coordinates (45.036368, -122.833275), as the river continues its course northward. North of Mt. Angel, Butte Creek, which also comes down from the Cascade Range, past Scotts Mills, empties into the Pudding River, at the coordinates (45.160768, -122.773569). The river continues northward past the town of Aurora. For most of its course, it defines part of the boundary between Marion and Clackamas Counties. It is approximately 62 miles (100 km) long and drains an area of approximately 531 square miles (1,375 km²). Its tributaries include the Little Pudding River. The Pudding River flows into the Molalla River, at coordinates (45.282375, -122.716856), just before the Molalla joins the Willamette River, in a floodplain that is part of the Molalla River State Park, an important habitat for wildlife in the Willamette Valley.
