Word to the wise, too: don't ever ride Standing Rocks trails if they're marked "closed", no matter how dry it has been and how dry the trails actually are. I headed up there this past Memorial Day, only to find the trails closed. I thought it was strange, given that the last rainfall was more than a day earlier, and it certainly wasn't much. A "local" just coming off the the trails told me that they were open and completely dry, but because it was Memorial Day, the county parks people likely didn't change the sign.
I took him for his word and headed out. A few miles from finishing (and a few miles deep ino the woods), a county parks truck w/ two rangers pulled up along a parallel ski trail and gave me a long lecture and threatened a $180-some dollar fine for riding a closed trail. I explained the situation and the misinformation I received and was let go with a warning. (sidebar: The trails are too wet for bikes, but ok for trucks?)
It's pretty surprising how aggressive they are with closing this trail. I completely agree with closing wet trails and I never ride trails that are wet, even when they're open. However, we live in a state where (in the summer) it rains every few days. That makes it pretty hard for anyone outside of Stevens Point to plan a ride at Standing Rocks, and I'm sure many avoid it, knowing the county's reputation for closing. Just seems a little heavy-handed, and I know many agree.