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, a cross country course (home course for Portland State Vikings cross country) 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.