AMP: 18 Location: Wyoming Blvd and I-25, Casper Welcome to Casper! AMP: 15 Location: Wyoming Blvd and 15th St, Natrona Cty As we momentarily head out of the city of Casper, state maintenance will begin. It’s unclear how this works, exactly, but from what I can tell the city of Casper has taken over maintenance … Continue reading Wyoming Highway 258, I-25 to WYO 251