The ascent is listed as Mt Goat, due to the duration of the Starvation Mountain climb. It's a long way to the top...consider using a shuttle.
The typical 15mi (3800' ascent) Lightning Creek Tr425 CCW loop involves FR4225 to FR4230 to FR190, returning to the TH on Lightning Creek Tr425.
The use of 9.8mi of forest roads results in 35% singletrack by distance and much less by time, which does not meet the listing requirements for this site.
Due to it's sandy surface, Lightning Creek Tr425 is best ridden downhill.
Like the Lightning Creek Loop, the Starvation Mountain ascent can use Middle Fork Beaver Cr Tr406 to avoid about 5mi of forest road climbing, or use a shuttle to the top of Starvation Mountain.
This epic 26.4mi (8% incline, 6300' ascent) CCW loop starts with 2.2mi on FR4225 to Middle Fork Beaver Cr Tr406, then climb 7.4mi on FR4235 to Golden Stairway Tr354, returning on Blue Buck Tr421.
Golden Stairway Tr354 accesses the upper Pearrygin Cr Tr526 TH.
The Starvation Mountain loop can be extended by riding out to Pearrygin Cr Tr526 at Beaver Meadow, then using the South Fork Trail to return to Blue Buck Tr421.
If less distance is desired, a 10mi Blue Buck Tr421 OAB would also work nicely...or use a FR4235 shuttle.
There will be Cows: Blue Buck Tr421 gets some grazing use, so please leave the gates the way you find them.
The 13.7mi (8% incline, 3500' ascent, 4.8mi of forest road) intermediate rider alternative: Go on FR4225 to Middle Fork Beaver Cr Tr406 to FR4235, returning on Lightning Creek Tr425.
This may involve some hike-a-bike, depending on climbing abilities.
The very-accessible Bear Mountain Trail ride is a CW loop with 4.7mi of FR4225-FR200 leading to a 2.4mi downhill. Nearby FR202 gets some XC Ski use.
The 11mi (1500' ascent) CCW Pipestone Canyon loop is another easily accessible off-season option, or as something to add as a last-day ride. The Pipestone Canyon road is really a doubletrack jeep road, a fast descent from Campbell Lake, through the Methow Valley State Wildlife Area.
Eastside Hiking options: Nearby Beaver Lake Tr356 is an easy 1mi hike through the forest to Beaver Lake. Granite Mountain Tr355 and Shrew Creek Tr321 are open to ORV but cover some nice Scotch Creek State Wildlife area terrain.
Bring a topo map if shuttling to Starvation Mountain, as there are many, many forest roads in the area, which may turn the ride into something far more adventurous than intended...
Blue Buck Trail 421, Golden Stairway Trail 354, Lightning Creek Trail 425, Middle Fork Beaver Creek Trail 406, South Fork Trail
Bear Mountain Trail, Buck Mountain Trail, Cedar Creek Trail 476, Clark Ridge Trail 363, Early Winters Trail 522, Cutthroat Pass Trail 483, Freezeout Ridge Trail 345, Granite Mountain Trail 355, North Summit Trail 369, Pearrygin Creek Trail 526.1, Pearrygin Ridge Trail 526, Pipestone Canyon, Shrew Creek Trail 321, Sun Mountain Trails, Tiffany Lake Trail 373, Tunnel Trail 353, West Fork Methow River Trail 480
Aqua Loop Trail, Beaver Pond Trail, Black Bear Trail, Bluejay Trail, Cabin Trail, Chickadee Trail, Criss Cross Trail, Fox Trail, Horse Trail, Inside Passage Trail, Kraule Trail, Lakeview Trail, Magpie Trail, Meadowlark Trail, Moose Trail, Little Wolf Trail, Overland Trail, Patterson Lake Trail, Pine Forest Trail, Rader Creek Trail, Raven Trail, Rodeo Trail, Sunnyside Trail, View Ridge Trail, Wolf Creek Trail, Yellowjacket Trail
Ranking consistently applied to all of the listed trails.