Become a Member

Members provide a critical source of dependable annual funding that Earthwatch uses to address urgent needs as well as plan for the future. Become an Earthwatch member with an annual gift and receive a variety of benefits, including discounts on Earthwatch clothing and expedition suppliesand more. Or, celebrate a holiday or special occasion by gifting a membership and all of its benefits to a loved one.


Membership Tiers & Benefits
Benefits Explorer ($45) Pioneer ($100) Trailblazer ($350) Supporter ($750)
Newsletters & Expedition Guide X X X X
Expedition Special Offers X X X X
Earthwatch Store Discount   X X X
Invitations to Exclusive Event   X X X
Annual Expedition Discount Drawing   X    
Annual Free Expedition Drawing     X X
Invitations to Personal Briefing from Staff       X

Join/Renew Membership



The Rosborough Society

Members who contribute $1,000 or more annually are invited to join The Rosborough Society. Aptly named for Earthwatch’s founder, Brian Rosborough, the Society helps to underwrite new research that will expand our reach and enable us to tackle emerging environmental challenges head on. Society members are eligible to receive a variety of benefits, including invitations to scientist-led webinars, personal visits and briefings from staff, special recognition in Earthwatch’s Annual Report, and more. 

Join or renew your Rosborough Society membership

Sustainer Members

Members who make a recurring monthly or quarterly gift as part of Earthwatch’s Sustainer program help to save time and resources by eliminating the need for pledge forms and renewal mailings. Sustainers will be given one summary statement of giving at the end of the calendar year in lieu of monthly receipts, and may elect to receive donor newsletters and other publications electronically. 

Become a Sustainer Member With a Recurring Gift

Gift Memberships

What do you give the eco-minded person in your life who doesn’t want more “stuff”? How about an Earthwatch membership? Membership giftees will receive a special announcement of your thoughtful gift and welcome package in the mail, member publications throughout the year (optional), and Earthwatch’s sincere gratitude as a valued new member who is helping to defend science and the planet.. 

Give a gift membership today


A woman at the bow of a boat holding a telescope.
a group of five people hiking in the forest.
The spotted seal (Phoca largha), also known as the larga seal or largha seal


Earthwatch depends on donations—above and beyond what we raise from volunteers who participate on our expeditions—in order to deliver our global conservation mission. In fact, volunteer contributions provide only half of the total resources Earthwatch needs to sustain over 40 field research expeditions, a wide variety of educational programs, corporate sustainability trainings, and more each year.