This area is also sometimes called South Fork Manastash Tr1386.1, one of many, many trails in the area.
As with the rest of the area, all the trails are open to Orv, and with all the camping sites in the area and close proximity to Ellensburg, this is a weekend Orv destination so try to ride these trails during the week is possible and avoid the obvious Orv routes.
As always, trail numbers which include 4W are actually doubletrack or forest roads, such as Shoestring Tr4W308 mostly consisting of FR308.
The zig-zagging Shoestring Lake Tr1385 and Tripod Flat Tr4W307 are the main north-south connectors, with the combination of Keenan Meadow Tr1386 and Hereford Meadows Tr1207 covering the width of this trail system and Manastash Lake Tr1350 at the eastern boundary of the trail system.
South Fork Manastash Creek ride: Keenan Meadow Tr1386 and Hereford Meadows Tr1207 as the primary OAB trails, using South Fork Manastash Tr1386.1 and Shoestring Lake Tr1385 on the return to add some terrain variety.
Covered in the guide, the challenging Hoyt Tr1347 to Frost Mountain Tr1366 19.5mi (5300' ascent) CCW Loop starts from Taneum Junction, with an option to ascend (or shuttle ) FR3330 instead of Hoyt Tr1347.
Similar to the Frost Mountain loop, the ever-challenging Quartz Mtn Tr948 is to the west, but should be ridden from the Kaner Flat campground instead of from the ridgeline.
The Quartz Mountain campground is at the highest elevation in this area, so is not a good trailhead location unless shuttling.
FR3111 leads to Tamarack Spring campground, a good mountain bike camping location.
Frost Creek Trail 1347.1, Frost Mountain Trail 1366, Gnat Flat Trail 1236, Hereford Meadows Trail 1207, Hoyt Trail 1347, Keenan Meadow Trail 1386, Rocky Saddle Trail 1384, Shoestring Lake Trail 1385, South Fork Manastash Trail 1386.1
Divide Trail 4W311, Frost Trail 4W310, Manastash Ridge Trail 4W306, Tipover Trail 4W330, Shoestring Trail 4W308, Summit Trail 4W694, Bucky Trail ATV30, Tripod Flat Trail 4W307
Ranking consistently applied to all of the listed trails.