FS-370/380 are both unmaintained roads and high clearance/4WD vehicles are highly recommended. FS-370 from Todd Lake to the intersection with FS-380 is passable in a less capable vehicle but FS-380 is very rough. I have driven both in the past in a front wheel drive Honda Element and we did see several passenger cars in the parking area but you have been fairly warned. There is not an established trail and the approach involves some steep and loose cinder slopes. I would classify this as an intermediate to advanced hike, requiring good fitness and route finding skills. Ball Butte has fantastic 360 degree views of Broken Top, Tam McCarthur rim, Paulina Peak, Bend and eastward, Mt Bachelor, Tumalo and South Sister. A Central Cascade Wilderness Permit and NW Forest Pass are required for this hike. The Wilderness permits are available from Recreation.gov for $1 per person.
Full report here