The Maston area mountain bike trails have the distinction of being the lowest elevation desert trails in the Central Oregon area, so this area will be a good bet to try when other trails have too much snow or mud in the winter and spring. Other than the first half mile from the south end along the power line road it is all single track. It is flat enough that it does not warrant making profiles for but it is still good riding. The riding is technically very easy although there are a few sand traps and rocky sections to spice it up here and there.
Unlike Gray Butte there is currently no cattle grazing and the old juniper forest is in reasonably good shape. There are a couple of small private inholdings with houses near the river. You will not see these houses unless you get off the single track in attempt to see the river. The ride is mostly through forest with occasional mountain views. Speaking of mountain views it is a good thing that Cline Butte is so close and visible because if you are out there without a map this is a key orienteering land mark. None of the trails or intersections are signed with names or numbers -yet.
Getting There: The small southern parking area is five miles north of Tumalo on the Cline Falls Highway on Newcomb Rd. It is about a half mile east down the road just past the power line. In Google Maps enter Newcomb Rd @44.210638, -121.307956 as a destination. There is another bigger place to park north on the highway three miles north of Newcomb Rd. This red cinder road is on public land but is probably maintained by one of the land owner$ down on the River. There is single track that heads southeast just as soon as you turn off the highway. Enter Cline Falls Hwy @44.244908, -121.282308 to get to that one.