Crawfish Tr1421 is a popular loop which could be CW or CCW, but Crawfish Tr1421 is an easier ascent than Adams Mt Tr1419.
The tradeoff is that Crawfish Tr1421 is often considered a better downhill ride than Adams Mt Tr1419, so stronger climbers may prefer to ride this as a CW loop.
Crawfish is a favorite with downhill riders, who shuttle to Knott Tr1417 on FR2241, so may be a hassle/hazardous to ascend on the weekends.
FR2241 offers a 10% grade ascent to the top, a more reasonable loop ride than the Adams Mt Tr1419 ascent. Also consider using FR2263, FR717, FR834 (6mi, 2500' ascent) to Crawfish Lake, then hike-a-bike to FR2241.
Nearby Brice Cr Tr1403 can be added on as an end-of-day or second ride.
Bohemia National Recreation Trail 1407 extends to the eastern edge of Knott Tr1417, but is best approached from the south.
Hiking: Expect to encounter hikers on all of these trails. From the Mineral CG on Sharps Creek Rd (Co Rd 2460), Fairview Creek Tr1408 offers hikers 3mi of seclusion through second growth Douglas fir as it leads to the Fairview Mountain mining camps. Hardscrabble Ridge also has a trail, which is not maintained but something to check out if camping in the area.
Adams Mountain Trail 1419, Crawfish Trail 1421, Knott Trail 1417
Alpine Trail 3450, Aubrey Mountain Trail 3554, Bunch Grass Trail 3559, Cloverpatch Trail 3457, Deception Butte Trail 3466, Eagles Rest Trail 3461, Eugene to Pacific Crest Trail 3559, Eula Ridge Trail 3463, Goodman Creek Trail 3461.1, Hardesty Trail 3469, Hardesty Way Trail 1402, Larison Creek Trail 3646, Lawler Trail 3473, Lone Wolf-Patterson Mountain Trail 3470, Lost Creek Trail 3462, Middle Fork Willamette Trail 3609, Mount June Trail 1400, Salmon Creek Trail 4233, Sawtooth Trail 1401, South Willamette Trail 3465, Tire Mountain Trail 3485, Winberry Divide Trail 3476
Crawfish Lake Trail 1409, Fairview Creek Trail 1408
Cedar Creek Campground, Hobo Campground, Lund Park Campground, Mineral Campground
Ranking consistently applied to all of the listed trails.