Glass-bottom boat tours depart about every 30 minutes from 10 am to 6 pm year-round. Regular glass-bottom boat tours run about 30 minutes. For those curious to know even more about Silver Springs, extended 90-minute tours are available Friday through Sunday at 11 am, 1 pm, and 3 pm. During the 90-minute cruise, your boat captain will share the rich history of the springs while pointing out wildlife on land and underwater.