From the split of Spruce Mill Rd and Twin Lakes Rd, you can maybe drive up another ~.6 miles before the road is impassable due to snow. From the Sharkstooth TH via the West Mancos trail, snow started out as intermittent and unsupportive, then within about .5 miles changed to constant and unsupportive. Due to the snow-buried trail and deadfall between miles ~2-3.5 (from the road split), I opted to take an alternate route down that cut out most of the postholing by glissading down a mellow section of the north ridge. In hindsight, I would have taken this same route up as a snow climb with an earlier start and good overnight freeze. Trail runners were NOT ideal just yet, so my wishful thinking did not pay off.
Photos (click for slideshow):