Land Conservation & Stewardship

Originally founded as Bexar Land Trust in 1998, Green Spaces Alliance of South Texas started as a small, local, urban land trust focused on land conservation activities. The conservation emphasis has since spread to activities in the Southern Edwards Aquifer region and the San Antonio and Nueces River Basins. We are accredited by the Land Trust Accreditation Commission and have helped conserve over 50,000 acres in our region. Our trained and knowledgeable staff will walk you through every step of the process, and our local experience and personal touch will ensure peace of mind.

As a local land trust, our landowner relationships underline accurate information about land conservation and help provide available options to achieve long-term goals for ecologically healthy properties, preserving family heritage, potential economic benefits, and the evaluation of natural resource management practices. Since 2000, we have been part of a team that negotiates conservation easements in Bexar, Medina, and Uvalde counties through the City of San Antonio’s Edwards Aquifer Protection Program. The program has resulted in over 143,000 acres of conserved land over critical areas that recharge the Edwards Aquifer, the City’s major source of drinking water.

A land trust is a nonprofit organization that works to protect natural areas by negotiating voluntary agreements with private property owners to leave their land undeveloped in perpetuity. The accreditation seal is a mark of distinction in land conservation. A land trust becomes accredited only after a rigorous process to verify the organizations meets national standards. The seal identifies land trusts that are accredited and meet national standards for excellence, uphold the public trust and ensure that conservation efforts are permanent.

Managed Lands

Green Space Alliance owns and manages two properties that were donated in the past. One property, Bulverde Oaks Nature Preserve, is within San Antonio city limits while the other, Lockett is an hour...

Conservation Easements

In Texas, 95% of land is privately owned. That is almost 160,000,000 acres of privately owned small farms, ranches, forests, and other working lands. However, some of that acreage is city blocks and...


Our land trust operations have a vast impact on community sustainability, citizen health, and the assurance that people have clean, affordable drinking water. Moreover, by facilitating the perpetual...

Bulverde Oaks Nature Preserve

Nestled between a major highway and limestone and concrete industries lies an unlikely peaceful oasis. Bulverde Oaks Nature Preserve, gifted in 2010, is owned and managed by Green Spaces Alliance....

For more information, contact Matthew Fischer, Director of Conservation and Stewardship:  (210) 222-8430 ext. 305.

Bulverde Oaks First Saturday Hikes in partnership with Texas Master Naturalist.


  • Nature Hike
    December 5, 2020 9:00 am

    Open to the public!  Join us for a nature tour on the 1-mile out-and-back trail to see the rescue bee hives, bird blind, stock pond,…