Really cool trail. About 1/3 is a recently used (first third if going counter-clockwise) but not used very often forest road, then 1/3 is that same road, but more deteriorated, and 1/3 single biking/hiking trail. Only really rocky through about 1/3 or more, and never too difficult. Great view of Willow Springs at the northernmost tip at a small rock dam. You can cross to the other side of the lake here and circle it, but the trail veers left and stays only on the East coast. You could easily pack a snack or lunch, cross over and do some fishing, then just bike back to the trailhead without even doing the loop. The only people I saw were on that side fishing, and some fishers in a boat.
There are a couple spots along the East coast of the springs where it is difficult to tell which way to go. Just look really hard at each possible way, and you will finally see one of the brown bike trail diamond signs. Going counter-clockwise down at the Southeastern tip of the Springs, if you hit 260, you went too far. You can go left and ride on 260 for 100 yards or so and turn on to the first forest road on the left, and you will immediately see the bike trail signs again. Or, you can backtrack from 260 about 100 yards, then cross a big swath of tree cuttings to get to that same forest road. Go right and up near 260 you will see the trail signs. The big area where they cut down the trees is probably where the bike trail signs that I missed, used to be.
I did what is officially the Springs Trail #633. See link for specific info. This is an excellent under 4 mi easy trail, in the forest, beautiful during the right season. It is so near housing and roads, etc., but it feels like you have "gotten away".
Our hike through this mixed consider and deciduous forest this autumn day was delightful. Although the trail was rocky, it no steep ascents or decents. One problem was that the driving directions to the trailhead were, in fact, directions to a connecting trail (Billy Creek). This made the total length twelve and a half miles. My wife and I met a few mountain bikers and some other trail runners, hikers, and their dogs. We are looking forward to snow shoeing the trail later this winter.