April 15 wasn't just Income Tax Day, even for the federal government. It's when Great Sand Dunes Naitonal Monument opened Medano Pass "for the summer" -- an early summer, on account of this year's drought. On opening day, the road was mostly dry, and the creek fords were passable. Four-wheel-drive vehicles are required from the Point of No Return to the top of the pass.
The Park Service cautions that spring snows could close the road for a day or two -- but we suspect there wouldn't be many complaints, given how dry it's been.