AMP: 0 Location: 750 N and Willard Bay Rd, Willard Just after the interstates, SR-315 turns left to head into Willard Bay State Park. AMP: 0 Location: Willard Bay Rd and 750 N, Willard Fee station after the turn. Willard Bay is a fairly expensive park – somewhere between $10 and $20 depending on what time of … Continue reading Utah State Route 315, I-15/I-84 to Willard Bay State Park