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CBTA is a non-profit educational association dedicated to the interpretation of human and natural history at Calaveras Big Trees State Park, in cooperation with the California State Park System. All contributions are tax deductible.

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The State Park Foundation does a great job of staying on top of current reports with regard to the state park closures. Please visit their site by clicking here for the latest update.

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2016 Spring Seminars

May 21            “Roosevelt’s Tree Army”  Presented by Sharon Giacomazzi

The enduring legacy of the Civilian Conservation Corp in National Forests.

Sharon Giacomazzi is an avid Central Sierra Nevada hiker, as well as a Sierra history buff.  In the past 30 years she has trekked about 12,000 miles in and around Yosemite National Park.  Sharon has been an outings leader for several environmental organizations, community colleges, as well as a leader of her own history hikes.  To date, Sharon has three historical hiking guides in publication and  a fourth book of short hikes, maximum five miles, maximum 500-foot elevation gain  in the works.


May 28 “Dragonflies”  Presented by Kathy Biggs

The talk will probably be followed by a short walk to look for dragonflies in the park.

Kathy worked as an educator in her hometown of Sebastopol, CA in the Gravenstein School district for 18 years before becoming an author/publisher/dragonfly/wildlife pond spokesperson.   Kathy’s love of dragonflies led her to become the author of California’s first dragonfly guide, published in 2000, Common Dragonflies of California. It sold out at over 14,000 copies and the new revision and complete update of this guide is now available – published May 2009.

June 4      “California’s Golden Geology of the Sierra Nevada”   Presented by Nancy Muleady Mecham

The geology of California with a special look at the Mother Lode and gold mining.  Join Doc Nancy for an in-depth look at the fascinating element, gold.  What are its unique properties, what is the geology behind the Mother Lode Story, and how did we get our hands on it throughout time.  Doc Nancy is an Adjunct Professor of Biology at Northern Arizona University as well as a Visiting Lecturer for the University of Virginia Semester At Sea Program where she taught biology around the world.  She also teaches part time at Columbia College.  She was selected by the United States as a Fulbright Scholar and traveled to the Russian Federation teach at Gorno-Altaisk State University in southwest Siberia and to conduct research in remote protected areas.

Nancy is a retired United States National Park Ranger and lives in the Sierra Nevada with her family.  When not working on her research on Giant Sequoias she loves to backpack.  She has completed solo hikes of the John Muir and High Sierra Trails through the Sierra Nevada, hiked through the Alps on The Haute Route from Chamonix to Zermatt, and is a Pacific Crest Trail section hiker.  She is the author of several books.

All Seminars will be held in Jack Knight Hall at Calaveras Big Trees State Park from 10:00 am-12 noon  There is a day-use fee to enter the Park.  The seminars are free and open to the public.  Pack a lunch, bring the family and plan on spending the day among the Giant Sequoias.  For more information call Calaveras Big Trees Association at (209)795-1196 or visit our website at


Scholarship Opportunities

CBTA is proud to be able to offer five $1000 academic scholarships this year to students who have chosen to pursue an education and/or career in environmentally related fields.  The purpose of the scholarships is to provide a monetary award to four promising California upper division or graduate students, who have shown an educational and career commitment to the study of the environment, and shows a commitment to communicate and interpret a love of nature, and an understanding of need to practice conservation.

Students pursuing degrees in environmental protection, forestry, wildlife and fisheries biology, parks and recreation, park management, environmental law and public policy, environmental art, and California history are encouraged to apply.  Dedication ideals of the scholarship will be considered at least as important as financial need in making the award.

The opportunity for CBTA to offer scholarships started with the Emily M. Hewitt Memorial Scholarship.  The Hewitt family funds this scholarship to honor Emily M. Hewitt and to honor a student who shared her love of nature.  In addition to the Hewitt scholarship, CBTA is now able to also offer the Stephen K. Stocking Memorial Scholarship, as well as three CBTA scholarships.

Eligibility for application is extended to any student or graduate student enrolled full-time in an accredited California post-secondary educational institution whose educational career goals clearly are related to communicating and interpreting nature’s wonder.  Please visit Scholarship  for more information and application.  The deadline is April 15.  The Scholarships are awarded at the CBTA Annual Picnic in June.

February in the Park

Visitor Center

Daily     10:00 am – 4:00 pm


Closed for the season

Camping –  

North Grove Campground –  We are now on reservation for sites 1 – 12.  Please click here to make reservations.

Rental Cabins are available.  Click Here for more information

Oak Hollow Campground – Closed for the season

The Dump Station – Closed for the season

North Grove Guided Tours – Guided walks of the North Grove are held on Saturday at 1 pm.   The walk is 1.5 to 2 hours.  Meet in front of the Visitor Center.  Bring water and your comfortable shoes.

Snowshoe Walk
 When appropriate – the guided walk becomes a snowshoe walk.  Snowshoes are provided.
Warming Hut
The Warming Hut will be open  weekends and holidays through March, 2016.  Stop by to say hello and to have some hot chocolate or hot apple cider compliments of Calaveras Big Trees Association.



Other Winter Activities

On Your Own – Snow play is allowed in the North Grove area.  Build a snow person, ride a sled, or simply marvel at the beauty.  Bring your own cross-country skis or snowshoes and travel the North Grove trail or the 3.5 mile loop out the park road and back through the campground.


Join CBTA !

Support from members helps the Calaveras Big Trees Association fulfill its mission of delivering high quality educational and interpretative programs at Calaveras Big Trees State Park.

Since 1974, CBTA has been able to assist in enhancing the visitor’s exploration and enjoyment of Calaveras Big Trees State Park.

Becoming a member of CBTA affords you unique benefits like seminars, workshops, trainings, special events, collaboration and so much more.  Other benefits include a 20% discount (beginning October 1st) in the Visitor Center store and the Big Tree Bulletin published three times a year.

But the greatest benefit of being a member of CBTA is knowing you are contributing to protecting Calaveras Big Trees State Park and helping others gain an understanding, awareness and appreciation of its natural, cultural and recreational resources.

CBTA was established as a 501(c)(3) non-profit corporation in 1974,  Therefore, your membership and contributions are tax deductible to the extent allowable by law.

If you would like to join, please click here to read about the different levels of membership and then to complete the application online or click here to download an application.  Thank you all for all of your support.  We couldn’t do it without you!  Please call the office at 209-795-1196 if you have any questions.

Support CBTA While You Shop

Now you can help Support Calaveras Big Trees Association as you Shop!

We now have several different programs that are easy to join that allow a percentage of your purchases to be directed to Calaveras Big Trees Association


The owners of Sierra Hills Market and Angels Food Market have generously made available the Escrip program to benefit local non-profit organizations through the use of the Escrip Community Card.  When you use your the card, CBTA has the ability to earn up to 5% of monthly purchases when you shop at either market.  How easy is that!  Just show your card or give the clerk your phone number and you help support CBTA.  Once you are enrolled, you can go online and find out about other benefits of the Escrip program.

To sign up simply down load the  form Escrip Form here, fill it out and take it with you the next time you shop at Sierra Hills or Angels Food Markets,  or you may sign up in the store.  Please indicate Calaveras Big Trees Association as your desired beneficiary.


S.H.A.R.E.S is an acronym for Supporting Humanities, Arts, Recreation,  Education and Sports and is Save imagesMart’s way of
giving back to the community.  Again, when you present this card at checkout, a percentage of your purchase is directed to CBTA.



If you shop at, you can now support CBTA by shopping at AmazonSmile.  Everything like Amazon Prime works just the same once you are

When first visiting AmazonSmile, you will  be prompted to select a charitable organization from almost one million eligible organizations.  For eligible purchases at AmazonSmile, the AmazonSmile Foundation will donate 0.5% of the purchase price to the customer’s selected charitable organization.

Click Here to get started.

However you choose to do it, it is a painless way to help CBTA continue its efforts to provide outstanding interpretive and educational programs at Calaveras Big Trees State Park.  Thank you for your continued support.  Please call the office with any questions at 209-795-1196.