On dec 26th my friend and I went fishing on Altoona lake, in altoona wi. The ice was 6-8″. Safe enough for a sled or quad. I was hoping to get a mid-afternoon crappie bite. We got some action, few perch and one little musky. All released. We fished a flat 13-16′ deep, straight for south boatlanding. All of our fish we pulled off the bottom.