Loop 3 travels out south shore, up the hill at Pat and Mike’s, then down through the tunnel. The route continues up Navarre Coulee Road, back to State Park then back along south shore to the Park. The most steepest climb is from Hwy 97A up Navarre Coulee Road which is short at 1.2 miles and 320 feet. The optional climb is near the end of the route, climbing up Chelan Butte Road to the end of the pavement. That climb is 1.2 miles and 660 feet.
Link to Loop 3 without optional climb https://ridewithgps.com/routes/29187695
Link to Loop 3 including optional climb https://ridewithgps.com/routes/29190757