To elaborate: during the melt, folks were walking on the trails (as is their right) and as the snow got soft, feet went through the surface and either created holes, or unsettled the snow. Now that the snow is hard (and I mean hella hard), there are ripples and holes all over the place, despite trying to flatten them with my snow shoes this morning. As well all the hills are now quite icy, which should make the up-hills interesting. The down-hills should be fine, as they are routed to go down uncompacted trails.
Set your tires on soft folks, and be ready to dab.