Blue Lake Regional Park is a public park in Fairview, in the U.S. state of Oregon. The 101-acre (41 ha) park, near the south shore of the Columbia River in Multnomah County, includes many covered and uncovered picnic areas, playing fields for sports such as softball, and infrastructure related to lake recreation including swimming, boating, and fishing.
Encompassing wooded areas, three ponds, and a wetland in addition to the lake, the park is frequented by migrating birds and other wildlife. Paved paths run through the park, which is near the 40 Mile Loop hiking and biking trail. Park vegetation includes cottonwoods, willows, and other trees and shrubs as well as wetland plants such as cattails. The 61-acre (25 ha) lake, which lies in a small artificial drainage basin, has no natural inlet or outlet.