Join 2 upcoming events being held in San Carlos. San Carlos, located in the Mexican state of Sonora, is a sunny coastal community known for its stunning beaches, clear waters teeming with marine life, and rugged mountain backdrop, making it a popular destination for outdoor activities such as sailing, fishing, scuba diving, and hiking, while its laid-back atmosphere and high-quality amenities also make it an ideal spot for relaxation and rejuvenation.