Mud Jam! I had a similar thing happen to me a few years ago. Decided to go out for a quick January ride. Ended up on some trails where the mud caked and baked, as I call it. What was suppose to be a two hour ride turned into six hours. Not only did mud pack under the front fender, stopping any forward progress, but it also jam packed in the rear swing arm area. I took off the front fender hoping this would help. Not so much! I had to stop about every 25 yards and spend a half hour digging out mud. Eventually, I found a "sand" trail, stuck to it until it reached a paved road. I drove right back to the truck. I try to wait for trails to dry out abit now.
Thanks for the reminder (of what I don't want to ride on)! ha ha