Sunshine Valley
Been a few years since i rode out there, Pull off the highway take your first left follow that road till the bridge after the bridge is the start of the FSR you can or could park there when was there last. There are few Cabins along the road so might want to not goose it till bit farther back. From there you could take the upper trail go up to the old ski hill not to sure if the riding would be to good back that way trees have taken back over the cuts they had made. You can take the lower trail ways back but really steep and avy prone few good steams to cross. Now off the lower trail you can or could ride a make shift bridge across the river used it few times and skipped the sled across river too, not to big of a river more of a stream. There is two ways you can go both take you up to the alpine the trail from there is sketchy, there are wash outs and loseing a sled off the FSR and its parts good 400 foot drop to the bottom.
Like i said its been 4 to 5 years since i last rode out there and trails can get grown over washed out and just not maintained or they could be cutting back there again and have fixed them not to sure.