Preserve Manager: Ben Hutchins
O-9 Well is a classic Texas cave. It is a multi-drop, 100-meter-deep cave that requires a wetsuit and proficiency on rope. The cave is historically significant, once serving as a stop on the Ozona-San Angelo stagecoach line and during cattle drives between Mexico and Kansas City. A windmill is still used to draw water from the cave today.
Visitation closed due to COVID-19
To ensure safety and help prevent the spread of COVID-19, our preserves are closed to public visitation until further notice.
O-9 Well is managed by TCMA for the University Lands System. Per our management agreement, only TCMA members may visit O-9 Well for management or research-related trips, although recreational trips can take place before or afterwards. Access requires a formal request process, and thus, you should contact the cave manager well in advance of any proposed trips.
If you are on an approved trip and need to become a TCMA member or renew your membership, you can do so online on our Membership page. With your membership, you will receive a confirmation email that you must submit to your trip leader before entering the cave.
You can help.
The conservation work done by the TCMA is only possible with the support of people like you. Please consider volunteering your time, making a donation, or becoming a member.