Cross Timbers Sierra Club is an outdoor recreation and conservation organization located in the upper North Texas region that includes cities like Denton and McKinney.  The ‘cross timbers’ ecosystem once thrived all over our region. Today, the eco-regions in North Texas are a combination of the Cross Timbers and Post Oak Savannah wildlife districts.

Please add us on Facebook, and check the calendar events in your area.

Here’s how you can get involved:

photo - members in the Caney Creek Wilderness

  • Join the Outings Committee to plan camping trips, day hikes, outdoor activities, and volunteer opportunities.
  • Join the Conservation Issues Committee to collaborate on regional and national initiatives that help to improve and protect the environment.
  • Join the Leadership Team to coordinate club meetings, organization operations, and team-building activities.

For more information please email us at CrossTimbersSierraClub@gmail.com.

About the Lone Star Chapter (LSC) of Texas

The Cross Timbers Group is a member of the Lone Star Chapter, the state-wide chapter of Texas. The Sierra Club Lone Star Chapter (LSC) of Texas represents approximately 21,000 Texans and 10 regional groups from Big Bend to Houston.

The LSC State Conservation Office, located near the State Capitol in Austin, serves as a lobbying office and grassroots communications center supporting advocacy and education about our environmental priorities:

  • Clean Air & Water
  • Smart Energy Solutions
  • Texas Land & Wildlife Legacy
  • Water for People & the Environment
  • Responsible Transportation Choices
  • Stable Climate

The Lone Star Chapter of the Sierra Club values diversity and promotes environmental education and environmental justice in our efforts to fulfill our mission to explore, enjoy, and protect our Texas natural heritage and to protect public health.

Yosemite National Park

About Sierra Club

Founded by legendary conservationist John Muir in 1892, the Sierra Club is now the nation’s largest and most influential grassroots environmental organization — with more than two million members and supporters. Our successes range from protecting millions of acres of wilderness to helping pass the Clean Air Act, Clean Water Act, and Endangered Species Act. More recently, we’ve made history by leading the charge to move away from the dirty fossil fuels that cause climate disruption and toward a clean energy economy.


To explore, enjoy, and protect the wild places of the earth; To practice and promote the responsible use of the earth’s ecosystems and resources; To educate and enlist humanity to protect and restore the quality of the natural and human environment; and to use all lawful means to carry out these objectives.

The Sierra Club mission of preservation and enjoyment of the natural environment reverberates throughout all its chapters and local groups.  The enduring strength and prestige of the Sierra Club stems not only from the programs and work of the national organization, but also from the dedicated efforts of its local groups.  The grass roots of the organization are made strong by the diverse interests and special concerns of local groups and individual members.

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