Imperial National Wildlife Refuge encompasses 25,768 acres along the lower Colorado River. The Arizona section of the refuge is 40 mi. n. off US 95 via Martinez Lake Rd., following signs. The remainder of the refuge can be reached best by boat or four-wheel-drive vehicle. Canada geese, ducks, egrets and eagles gather at the refuge. Hiking, hunting, fishing and boating are permitted in designated areas. Maps and public-use regulations are available upon request.