The only minus I see to Rock Bridge is the 5-mile gravel road to the parking lot.
Although I have taken the (Class 1.1) Creation Falls/Rock Bridge loop many times to see the Grade A+ Rock Bridge, I didn’t continue my hike to Grade A Turtleback Arch until 2026. The much longer 4.5-mile loop to include Turtleback Arch would push the hike to a Class 1.3 (since the hike is over 2 miles), but some serious, vertical rock climbing for 20 feet is required after Turtleback Arch, making the entire loop Class 2.3. You must walk 0.9 mile on the Rock Bridge gravel road to the parking lot. Turtleback Arch is such a nice arch that you could park at the parking spot where the Turtleback Arch trail meets the gravel road and skip Rock Bridge and the falls for a much shorter Class 2.0 hike.