There is a large tree down across the trail on Kettle Morraine. Went to cut it out but there is an active nest of yellow jackets right next to it. A bunch of us rode it yesterday and climbed over the tree without issue but they can be very aggressive. If you're allergic probably best to avoid Kettle all together. The trail crew disturbed a nest in the same area last year and it was not a good time, multiple people with stings. We'll work on getting rid of both the yellow jackets and the tree.