Osoyoos Lake is a 27-mile long lake located in Washington State near Oroville. The lake was formed by glacial activity during the last Ice Age and has a maximum depth of 53 meters. The lake is fed by the Okanagan River and its tributaries, which provide important surface flow and snowpack for the lake. The lake is also used for agricultural purposes, with irrigation systems drawing water from the lake to support orchards and vineyards in the surrounding area. In addition, the lake is a popular recreational destination, with opportunities for swimming, boating, and fishing. The lake is home to several fish species, including rainbow trout, kokanee salmon, and smallmouth bass. Osoyoos Lake is an important resource for the region, providing valuable water resources for agriculture and recreation.