Ochoco National Forest

Dry Mountain is a drive up summit near the Burns-Hines area with a lookout tower and cabin. To get there I recommend this route: 

Turn north off of US-20 at 43.5467, -119.0847 onto NF-47, aka Hines Logging Road.

At 43.64275, -119.2629 turn west onto US-41, aka Donelly Road.

At 43.7038, -119.3953 turn onto US-4120, aka Beaver Slide Road.

Stay on this road until you find a lookout tower.

The road is very good to good until the last half mile or so where it gets a bit rough. Possibly not Priusable, but easy in a Rav4 or higher clearance vehicle.

Highland Flat is located in the Ochoco National Forest, approx 15 miles north of Priveville.  In April 2019 I completed a first-time activation of the summit which is suprising since there's very good forest road access up to near the activation zone.  My activation was more challanging due to snow which resulted in a 4-mile snowshoe hike.  But this is usually an easy 4-pointer and recommended for anyone visiting the Prineville area.