West of Bend in the Deschutes National Forest, the 420 Loop Trail is a 12 mile double track route on forest roads through pines, snowbrush and wildflowers.
To reach the mountain biking trailhead from Bend, head west on Franklin Street and follow to Galveston Street. Turn right heading west on Galveston Street crossing the river. Continue on Galveston Street to the round-about at NW14th Street. Continue heading west on Skyline Road for 4.7 miles.
Park here and begin the loop. Follow FS 4610 and turn right onto FS 900. Continue down FS 900 until you reach FS 300. Turn right onto FS 300 and after 50 feet, turn left onto FS 310. Stay on FS 310 for 1.75 miles, riding over a short section of closed road, and then turn left onto FS 420 and climb the double track to its end-where there is a great overlook view of the high desert and of the forest through which you have been riding. Return via FS 420 and turn left back onto FS 310. Ride 0.5 mile to FS 4615, where you turn left and begin the moderate 2 mile descent. Turn left onto a closed road (FS 745) and bear right at a fork in the road to continue on FS 745. Make a right onto FS 700 and after 0.3 mile turn left onto FS 290. Descend through a wide open forest of lodgepole pine on a very nice double track. At FS 350 turn right and mountain bike ride to FS 4610, where a left turn leads back to the trailhead.
Overall, 420 Loop Trail is the 6th most popular mountain bike trail of all 55 mountain biking rides in Oregon.