Porcupine Bay is a section of the Spokane River Arm, part of Lake Roosevelt National Recreation Area in Washington. This is a large, human-made reservoir on the Columbia River, with water levels managed by Grand Coulee Dam. The primary and only confirmed public launch point for paddlers is the Porcupine Bay Boat Launch, a paved ramp with a dock, large parking area, vault toilet, and information kiosk. The National Park Service lists a minimum elevation of 1243 feet for the boat launch to be usable, and lake levels fluctuate significantly throughout the year, ranging from 1208 to 1290 feet. Paddlers must check current lake levels before planning a trip. The Porcupine Bay Campground, with 31 individual sites, is directly adjacent to the launch and is reservation-only year-round, though winter services are limited. The area is characterized by high desert terrain with ponderosa pines and shrubs lining the banks, offering a scenic and relatively untouched feel. The Spokane Indian Reservation borders the northern bank, while the southern bank is federal land. The waterway is noted for its quiet, remote character upstream, though powerboat traffic increases downstream towards the confluence with the main body of Lake Roosevelt. A common multi-day paddling route is a 4-night trip from Porcupine Bay Campground and Boat Launch to Spring Canyon, a distance of less than 50 miles. All vessels, including canoes and kayaks, must carry a U.S. Coast Guard-approved life jacket for each person, and children 12 and under must wear them at all times when underway. A sound-producing device like a whistle is also required. The lake supports abundant wildlife, including bald eagles, osprey, blue herons, moose, elk, and deer.