The North Ridge and Goat Peak area trails descend to the Yakima River valley, with a typical descent of ~1700' over 1.5mi, limiting the appeal of these trails for most riders.
Those seeking big elevation gains will often have this terrain to themselves. This is an Orv area but these trails are at the edge of that area, so get less motorized use.
The extreme terrain and lack of connecting trails to Goat Peak Tr1304 limits the loop option to FR4110 and makes the initial 2mi ascent mostly hike-a-bike.
Granite Creek Tr1326.1 is no easier, with 2mi of 19% mostly hike-a-bike grade, plus two creek crossings.
If riding North Ridge OAB, the first 3mi (2500' ascent) is a slightly more manageable 16%.
Ding: Combined with the steep terrain, Orv use results in hugely rutted trails (2' ruts in places), which leads to a lot of hike-a-bike.
To connect Granite Creek Tr1326.1 to North Ridge Tr1321, the suggested loop relies on Cle Elum Ridge Tr1326 rather than using Little Creek Basin Tr1334, to avoid traversing the Little Creek Drainage.
The ride could be extended further by looping around Mount Clifty, using Mount Clifty Tr1321.1. A version of that loop is described on the Manastash Ridge Tr1388 page.
The Mt Goat-worthy 13.5mi (5800' ascent) Goat Peak Tr1304 OAB offers a 20% grade 2mi climb, but can be tamed by starting the ride from the FR118 (southern) TH.
FR4110 is washed out at Cabin Creek, just past the FR140 intersection, so to get to the FR118 TH, take FR54 to FR41 to FR4110.
A 39mi (13000' ascent) Mt Goat epic: Ascend North Ridge Tr1321 then ride Manastash Ridge Tr1388 to Blowout Mountain Tr1318, returning on Goat Peak Tr1304.
Some of this terrain is also shown on the Bear Creek Tr943 page.
Shuttle to the North Ridge Tr1321 and Goat Peak Tr1304 and cut the ride down to a mere 31mi.
Tempting, but no: Big Creek Tr1341 and Big Goat Tr1304.1 are only open for hiking.
Big Creek Trail 1341, Big Goat Trail 1304.1, Blazed Ridge Trail 1333, Blowout Mountain Trail 1318, North Ridge Trail 1321, Cle Elum Ridge Trail 1326, Goat Peak Trail 1304, Granite Creek Trail 1326.1, Little Creek Basin Trail 1334, Greek Creek Basin Trail 1321.2, Mount Clifty Trail 1321.1
Lake Easton State Park Campground
Ranking consistently applied to all of the listed trails.