Oklahoma River Trails is a standout hiking trail in Oklahoma City, OK, covering 7.5 miles with 50ft of elevation gain. Stats: 7.5 miles, 50ft gain, Easy. Type: Loop. Surface: Paved. Time: 3 hours. Fee: Free. Dogs: Yes, on leash. Permit: No. Wildlife: herons, turtles, coyotes. Best seasons: Year-round; urban trail along the North Canadian River. Bring water, sun protection, and appropriate footwear for OKs conditions. Leave No Trace: pack out waste, stay on trail, respect wildlife.