Muddy Tread Challenge

I tramped out past the courtyard gate after noon to patrol the dirt shoulder of the park trail! Resting squarely across the damp soil lay a heavy, discarded bicycle tire tread, curled like a ribbed rubber canyon. A formidable embankment! I planted my stout front feet deep into the moist grit, dropped my broad head low, and barged my heavy chin straight into the grooved rubber arch. THUD-SQUISH! The thick tread bowed under my weight, sinking half an inch into the soft mud and releasing a cool spurt of trapped rainwater straight across my chest! I held fast, gaping my jaws wide in a booming roar of triumph across the open path!