Lone Star MOPAR Fest 2026 rolls into Boerne Main Plaza for its Sweet Sixteen celebration, and it's a family-friendly day for anyone who loves cars. Owners and fans of Chrysler, Dodge, Plymouth, Jeep and other MOPAR vehicles gather to admire an impressive collection of rides and swap stories. The event puts camaraderie ahead of competition, so longtime gearheads and curious spectators are equally welcome.