Lava Reservoir   Be the first to submit input for Lava Reservoir. If you have info on Lava Reservoir, Malheur County, Oregon please submit it here to improve this web site.          These outdoors activities are available near Lava Reservoir.   Public Lands Near Lava Reservoir: Lake Owyhee State Park, Oregon, 31 miles away   Whitewater Near Lava Reservoir: Owyhee River, MalheurCounty, 18 miles away       Class III-IV - 65 miles long (Rome to Owyhee Reservoir)