*This loop is only available during fall/winter when the water is low enough to reveal the old bridge over the river* Start the Sweetwater trail at the gated trailhead. Ride the complete trail, then ride up Salmon Falls Road for 1/4 mile, cross the Salmon Falls Bridge, and start riding the Salmon Falls trail. Continue 4 miles on the Salmon Falls trail (7 miles total). When you are at the top of a hill overlooking a large field, with the river on your left, you will see the old bridge visible to your left. Ride down the hill, cross the bridge, and continue straight to rejoin the Sweetwater trail. When you get to the Sweetwater trail, turn right, and ride about 1 mile back to the trail head.