Follow the usual road to Black Velvet, but turn left at the Windy Peak fork. Drive until you find a good turnout beneath the east face and go up the steep hillside.
The Classics
Mountain Project's determination of some of the classic, most popular, highest rated routes for Windy Pk, East Face:
30 minutes is accurate if you're a fast uphill hiker, 45 minutes might be more likely... Park in the same locale as if you're going up to the South Face.