I rode Chimney Rock late-morning to early afternoon today. As the temps were below freezing the entire time (per weather.com), there wasn't much mud to speak of. Due to the melting and re-freezing of snow the past few days, though, there's a lot of ice covering the trails currently. This requires quite a bit of caution -- not a good day for posting a personal best on Strava! There are also places where thin sheets of ice are covering several inches of pooled water, which can cave in unexpectedly (or maybe not so unexpectedly).
So, if you ride and it's icy like it was today -- be careful!