This fellow was spotted on Camp Trail in May of 2019. He’s a member of the Xystodesmidae is a family of millipedes, which was named by O. F. Cook (no relation!) in 1895.
According to Wikipedia, this orange & black millipede has been “reported to secrete cyanide compounds as a defense” – so don’t touch it! If you have touched it, make sure to wash your hands since “the toxic compounds it secretes are poisonous and can cause extreme irritation if rubbed in the eyes.”