The 26½-mile McKenzie River National Recreation Trail can certainly be completed in one day by a motivated mountain biker. From the reservoir, the trail becomes a smooth path of flowing singletrack down to the McKenzie Bridge Ranger Station at its south end. The last time I rode the entire McKenzie River Trail, I needed six hours to complete the route. The McKenzie River is crystal clear and ever-changing, from calm, rocky pools to churning whitewater. About 8½ miles into the ride, I decided to turn around, still a few miles from Trail Bridge Reservoir.