201 San Marcos Springs Dr., San Marcos, TX 78666 Visitor’s Information Hours: 9:30 AM – 5 PM daily Fees: Glass-bottom Boat Tours (30 min) Children 2 and under Free; Children (3-12) $6; Adults: $9.75; Seniors (65+) $8.00; Children (3-12): $6.00, 2 and Under FREE, Texas State University Faculty, Staff, and Students $5 with Valid ID;…

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