Angeles Forest has kept the road down to Lupine (3N39) open during summer-fall months, since they reopened it a couple years back (after years of fire rehab). However, when it was first reopened, it was blocked by large trees due to hazardous conditions and the following winter the road was washed out for good and no longer passable to Cabin Flat.
What a shame as the road to Cabin Flat was incredible. (watch for bears)