Dunn 50 70 Loop is a 7.2 mile loop trail located near Corvallis, Oregon and is only recommended for very experienced adventurers. The trail is primarily used for hiking and mountain biking and is accessible year-round. Dogs are also able to use this trail.
Experience all aspects of a NW forest with 1300 feet of climb From the 100 road gate follow road to the junction of the 150 & 170 road, go straight up the 150 road which turns into a single track as you leave Dunn Forest, which you'll climb till you come to a "T" go right on the 78V road which comes to a "T" go right and follow this main road to the top of the climb then stay on it as you head down the other side. This is where it gets tricky, as you come down you'll see a number of roads that come together and branch off, stay on the main road and follow it to the right, then as you break through into the open clear cut the road will take you down to a "T" where the main road goes left, you'll want to go right which becomes a single track road on an old log road. It will look like nothing is there at first and it goes down steeply at the end as you enter back into Dunn. At the bottom you'll pick up a single track trail as you cross the creek. Follow this trail down to the 170 road and out to 100 road and back to your car.
plenty of random roads snaking through, plenty of different places to explore however lots of dead ends due to logging and other large obstructions. I went off trail a fair bit foraging as well so would avoid using my map lol. definitely all logging roads wether that be a plus or minus.
Views were great but the original trail has been obliterated by recent logging and the roads were heavily graveled