We rode Olmstead over the weekend. The first half of the loop (assuming a counter clockwise ride) was great riding. Only a few puddles (though they were pretty icy), and overall dry. The back half, however..wow. Once you get to the double track sections with the thick dirt (in the summer), it gets REALLY thick and slow mud. I haven't ridden many times when my bike packed up with that much mud.
I rode Foresthill Divide Loop the weekend prior and it's pretty soggy, especially on the climb up the singletrack at Drivers Flat Rd. It was also icy that day in the shady spots, but that was prior to the current freeze we're experiencing. It was dry for the most part though - only muddy in a few spots. Since it's been two weeks or so without rain, it's probably dried up considerably by now.