This BLM road is only used as an access point to the Top of the Father of Ginormous. You'll find this road at a bend in BLM Road 8324. Drop in carefully as the first 40 yards of the road is super steep and filled with baby head rocks outside the one preferred line. Soon enough the doubletrack road becomes more gentle. Keep a close eye out for the small cairn on your left that marks the start of Father of Ginormous.
While the section leading down to Father of Ginormous is rideable, the section of road below this trail intersection (to the west) is not recommended for bikes. In a pinch, you could get to North Porcupine on this road, but it wouldn't be very pleasant.