by dan » Thu Dec 03, 2009 10:59 pm
I don't have personal experience, but I see more of the heavy snowmachine suites or similar in winter.
Highway 41 (Wawona Road) and as Big Oak Flat Road get icier in winter. Highway 140 from El Portal stays the clearest (less ice than the other routes), altough it too sometimes has some icy spots in the shade between Mariposa and Midpines. Midday (not morning or late afternoon) is usually better as the black ice is not as common then.