A good early or late season ride, Arnold Ice Cave Tr3963 can become a pathfinding expedition, due to low usage and lack of forest cover to help define and protect the trail.
Several long loops can be created by combining Arnold Ice Cave Tr3963, Coyote Loop Tr3962 and Swamp Wells Tr3961, with some connector trails such as Boyd Cave Tr3966 to shorten the ride if desired.
As FR18 is the only paved road in this area, Horse Butte TH gets the most use, but the Arnold Ice Cave TH is equally good.
Dings: Some of the local quarries are used as shooting ranges, so don't be too alarmed if you hear gunshots (unless of course you see bullets whizzing by). These trails get some equestrian use as well, so can become chewed up in wet, early season conditions. This trail system is near Bend and there is an extensive Orv trail system southeast of Arnold Ice Cave and the hundreds of fireroads in the area are popular with Orv as well.
Due to the lack of tree cover, expect high temperatures in August on Arnold Ice Cave Tr3963 and Coyote Loop Tr3962.
Arnold Alternative: A 25.5mi (2500' ascent) Swamp Wells Tr3961 to Coyote Loop Tr3962 CCW loop spends more time in the forest and avoids some of the pathfinding needed on the Arnold Ice Cave Tr3963 north of FR18.
Arnold Ice Cave Trail 3963, Bessie Butte Trail 3968, Boyd Cave Trail 3966, Coyote Loop Trail 3962, Fuzztail Butte Trail 3965, Skeleton Cave Trail 3967, Swamp Wells Trail 3961
Bens Trail 50, COD Trail 71, Edison-Lava Trail 31, Elfin Magic Trail 45, Farewell Trail 26, Flagline Trail 41, Flagline Access Trail 40.1, Flagline Tie Trail 41.1, Funner, Grand Slam Trail 44, Kents Trail 43, KGB Trail 72, Mrazek Trail 32, MTB Trail 51, North Fork Trail 24.2, Phils Trail 42, Sector 16 Trail 27, Skyliners Trail 28, South Fork Trail 25, Sparks Lake Trail 4, Storm King Trail 48, Swampy Lake Trail 23, Swampy Loop Trail 23.2, Swampy-Dutchman Trail 40, Swede Ridge Trail 52, Tiddlywinks, Tumalo Creek Trail 25.1, Tumalo Ridge Trail 25.2, Voodoo Trail 46
Ranking consistently applied to all of the listed trails.