Advance ticket purchase is required.Purchase Tickets! We are happy to share that Trinity River Audubon Center Trails are open! With the trails open on a limited basis, please be prepared for some changes: Registration: Advance ticket purchase is required. To reduce chances of Covid-19 spread, we will be limiting visitors to timed entry at each hour (ex. 9am, 10am, etc.) You must arrive and check in within 15 minutes of your entry time. Please note that 12pm is the last time slot for ticket purchase. Check-In Required: You will need to show your ticket at the front desk to enter the property.