Originally Posted by
TRRed
The road across Rocky Mountain National Park will, in all likelihood, still be closed for the winter.
True, and traditionally true until Memorial Day. However, the road
into RMNP will usually be open, subject to the typical March weather non-patterns.
From Denver, that's US 36 through Boulder and Lyons into Estes Park, then US 34 into the park. That time of year, I believe you can usually get to the Alluvial Fan and make the loop back on US 36.