Lake Umatilla, also known as Umatilla Reservoir, is a 110-mile stretch of the Columbia River between John Day Dam and McNary Dam along the Washington-Oregon border. This 48,000-acre lake offers diverse paddling opportunities with over 220 miles of shoreline. The lake's elevation is 268 feet above sea level.

Multiple boat launch ramps provide access, including Crow Butte Park, Plymouth, Railroad Island Park, Rock Creek, and Sundale Park. These ramps have concrete lanes, docks, and parking areas. Non-motorized boats like canoes and kayaks are permitted.

Popular fish species include smallmouth and largemouth bass, walleye, crappie, and catfish. Salmon and steelhead also pass through seasonally. Wildlife such as mule deer, waterfowl, and birds of prey can be observed along the shoreline.

The lake experiences a high desert climate. Mature shade trees line portions of the grassy banks. Water levels can fluctuate significantly, which paddlers should be aware of when planning trips.

Facilities at Lepage Park campground include flush toilets, showers, drinking water, and a boat ramp. Additional campgrounds and RV parks are located around the lake. Swimming and water skiing are popular summer activities.

Paddlers should be cautious of boat traffic, especially in the main channel. The lake can experience strong winds. Personal flotation devices are required. An Aquatic Invasive Species permit is needed for boats 10 feet and longer.

While specific paddling routes are not outlined, the numerous coves and inlets along the shoreline offer opportunities for exploration. The best seasons for paddling are likely spring through fall when temperatures are milder.