George Wyth State Park –
This park near Waterloo runs along the Cedar River and includes three lakes. One of them, George Wyth Lake, is a no wake lake with a handicap accessible fishing pier. Call 319-232-5505 for more information about accessibility and trail conditions. Although the trails are paved, occasional flooding on the Cedar River may make them inaccessible. You can download maps from their website.
? There are “…5.5 miles of paved multi-purpose trails, which are great for biking, in-line skating and walking.” They don’t mention wheelchairs, but I should think a paved trail good enough for in-line skating would qualify.
? There are 6 miles of grass hiking trails.