The Euchre Creek watershed is among the smallest coastal rivers in southern Oregon. Euchre Creek is approximately 14 miles long and flows in a southwesterly direction where the Euchre mainstem empties into the Pacific Ocean at Ophir, Oregon. Elevations in the watershed range from sea level to approximately 3,080 feet. Major tributaries include Cedar Creek and Boulder Creek. The lower few miles of the river lies on a relatively low gradient coastal floodplain. The upper portion of the basin is characterized by steeply sloped forested areas with narrow valleys and tributary streams that have moderately steep to very steep gradient. Rural residential development, grazing, and other agricultural uses are the dominant land uses in the lower portion of the basin.