2016
*  First annual ESTCNA held in Tampa Bay, Florida in partnership with the Patel College of Global Sustainability
2015
*  Largest ever ESTC held in Quito, Ecuador with the Ministry of Tourism of Ecuador
*  TIES turns 25 years old!
*  Revision of ecotourism Definition and Principles
*  Awards the Kelly Bricker Award to Simon Omalenge
2014
*  Ecotourism and Sustainable Tourism Conference held in Bonito, Brazil
*  Participates at “Beyond 2015: An Action Agenda by Non-governmental organizations” at the United Nations to include tourism as a significant contributor to the Sustainable Development Goals (SDGs)
*  Launch of the Certificate in Sustainable Tourism Management in partnership with George Washington University
2013
*  First international Ecotourism and Sustainable Tourism Conference held in Nairobi, Kenya
*  Awards Megan Epler-Wood “TIES Lifetime Achievement Award”
*  Launch of the Ecotourism Master Class Series
*  Publication of the Sustainable Tourism and the Millennium Development Goals
*  Launch of the University Consortium Certificate
2012
*  Ecotourism and Sustainable Tourism Conference held in Monterey, California
*  Participates USAID-sponsored ecotourism skills development program in Jordan
*  Launch of e-publication “The International Voluntourism Guidelines for Commercial Tour Operators” with support from the PlaneterraFoundation
*  Launch of the TIES Travel Ambassador Program
*  Destination Workshop: Making Sustainable Tourism Marketable
*  Authentic Ecolodge planning, design, and Operations Workshop
2011
*  Ecotourism and Sustainable Tourism Conference (ESTC) held in Hilton Head Island, SC, USA, in partnerships with Hilton Head Island-Bluffton Chamber of Commerce & Visitor Convention Bureau.
*  Organizes ESTC11 pre-conference workshops, including “Sustainable Tourism: Doing Good as a Market Driver”, a half-day workshop on destination marketing and management strategies.
*  Organizes a workshop on sustainable tourism business management in Grand Bahama, in partnerships with US Fish & Wildlife Service and Society for Conservation and Study of Caribbean Birds.
*  Organizes a workshop on ecotourism product development and destination marketing in South Korea, in partnership with Ecotourism Korea; Republic of Korea Ministry of Culture, Sports and Tourism.
*  Launches the International Voluntourism Guidelines Project, in partnership with Planeterra.
2010
*  TIES turns 20 years old!
*  Publishes “Ecotourism Then and Now” by TIES founder Megan EplerWood
*  Ecotourism and Sustainable Tourism Conference (ESTC) held in Portland, Oregon, USA, in partnerships with Travel Portland and Travel Oregon.
*  Presents the Innovation Leadership in Sustainable Tourism Award at the ESTC10.
*  Co-organizes the first European Ecotourism Conference (EuroEco), held in Parnu, Estonia.
*  Becomes a member of the Global Sustainable Tourism Council (GSTC).
2009
*  Launches the ecoDestinations program, with the goal of connecting travelers with inspiring ecotourism initiatives in various destinations around the world.
*  Launches Your Travel Choice Blog (YourTravelChoice.org), TIES new interactive communication platform to engage, educate and inspire.
*  Announces partnership with Planeterra Foundation, TIES Voluntourism Partner.
*  Publishes the first edition of the Travel Green Guide, TIES new annual e-publication serving as a resource guide to responsible travel options.
*  Announces conference partnership with the Adventure Travel Trade Association.
2008
*  Organizes, in partnership with local NGOs, “Washington DC Eco-Tour”, highlighting eco-friendly initiatives and educational opportunities in the greater Washington community.
*  Hosts a public forum “Indigenous Business Leaders in Ecotourism” in partnership with the Swedish Ecotourism Society.
*  Announces the Ecotourism and Sustainable Tourism Conference (ESTC) as TIES’ annual conference focusing on greening the tourism industry.
*  Organizes the Ecotourism and Sustainable Tourism Conference 2008 (ESTC08) in Vancouver, British Columbia, Canada.
*  Announces the first Lifetime Achievement Award.
2007
*  Organizes the Global Ecotourism Conference 2007 (Oslo, Norway), the first global gathering of ecotourism professionals after the IYE.
*  Organizes the North American Ecotourism Conference 2007 (Madison, Wisconsin), the first bi-national conference focused on ecotourism in North America.
2006
*  Launches the Advocacy Campaign “Traveling with Climate in Mind”
2005
*  Supports relief efforts and advocates for sustainable tourism in Indian Ocean countries devastated by tsunami.
*  Marks 15th anniversary with second “Celebration of Ecotourism” in Washington, DC.
*  Sponsors first conference on “Ecotourism in the U.S.” in Bar Harbor, Maine, together with local Chamber of Commerce.
2004
*  Co-hosts the Traveler’s Philanthropy conference at Stanford University in California, USA.
*  Holds first Annual General Meeting open to all members in Washington, DC.
*  Begins multi-year research on tourism certification as part of Rainforest Alliance-led project focusing on five Latin American countries.
2003
*  Participates in World Ecotourism Summit in Quebec City, Canada, organizing NGOs and indigenous groups, and offering training workshops.
*  Publishes International Ecolodge Guidelines.
*  Conducts study on social and environmental footprint of nature-based lodges around the world.
*  Launches distance learning courses and Sustainable Tourism Certification with the George Washington University.
2002
*  Holds additional IYE regional meetings in India, Peru, Thailand, Kenya and Sweden.
2001
*  With the United Nations Environment Program (UNEP), holds IYEregional meetings in Belize and the Seychelles.
*  Launches new online magazine, Ecotourism Observer, and publishes Ecotourism: Principles, Practices and Policies for Sustainability.
*  Joins Rainforest Alliance’s initiative to assess feasibility of creating accreditation system for sustainable tourism and ecotourism certification.
2000
*  Kicks off first consumer education campaign, “Your Travel Choice Can Make a Difference.”
*  Attends “Ecotourism and Sustainable Tourism Certification Workshop” at Mohonk Mountain House, New York and signs seminal “MohonkAgreement.”
*  Publishes The Business of Ecolodges, based on international survey of financial data from ecolodges.
*  Changes name to The International Ecotourism Society (TIES) in preparation for International Year of Ecotourism (IYE); moves its office from North Bennington to Burlington, Vermont.
1999
*  Publishes Marine Ecotourism Guidelines.
*  Holds ecotourism training workshop at the World Ecotourism Conference in Sabah, Malaysia.
*  Works with the Programme for Belize to analyze revenue generating strategies for conserving coral reefs.
*  Produces Cultural Survival Quarterly issue entitled “Protecting Indigenous Culture and Land through Ecotourism.”
1998
*  Holds regional workshop, “Planning and Developing an Ecotourism Destination,” in Quintana Roo, Mexico.
*  Co-hosts ecotourism training workshop for tour operators in Tahiti.
*  Conducts “Marine Ecotourism Stakeholder” meetings in the Caribbean and Mexico.
1997
*  Co-hosts first regional forum, “Ecotourism and Community Participation,” in Quito, Ecuador.
*  Together with Kenya Wildlife Service and Ecotourism Society of Kenya, sponsors regional conference, “Ecotourism at the Crossroads: Charting the Way Forward,” in Nairobi, Kenya.
1996
*  Holds first “Marine Ecotourism Workshop” in Hawaii.
*  Co-publishes Tourism, Ecotourism and Protected Areas, with the World Conservation Union (IUCN).
1995
*  Launches Ecotourism News Service and Ecotourism Society Research Service; issues first fact sheets and information packets.
*  Publishes The Ecolodge Sourcebook for Planners and Developers.
*  Holds forum in Costa Rica with participants from over 30 countries to define international ecolodge standards.
1994
*  Sponsors first “International Ecolodge Forum and Field Seminar on Ecolodge Design” at Maho Bay Camps, St. John, U.S. Virgin Islands.
*  Holds the first “International Ecotourism Partners” meeting in Virgin Islands to foster national and regional ecotourism associations.
1993
*  Publishes its first book, Ecotourism: A Guide for Planners and Manager and popular pamphlet Ecotourism Guidelines for Nature Tour Operators.
*  Working with member tour operators, helps win higher park entrance fees for foreign visitors to Costa Rica’s National Parks.
1992
*  Advocates for sound ecotourism practices at World Parks and Protected Areas Congress in Caracas, Venezuela and First World Congress on Tourism and the Environment in Belize.
*  Produces first set of comprehensive guidelines for ecotourism operators based on international surveys and focus groups.
1991
*  Board establishes TIES mission and the definition of ecotourism.
*  Works with Charles Darwin Foundation to find solutions to uncontrolled tourism growth in the Galapagos Islands, Ecuador.
*  Offers “Ecotourism Management Seminar” with the George Washington University in Washington, DC.
1990
*  TIES launched by a team organized by Megan Epler Wood at a conference in Florida in 1989 as the world’s first international non-profit dedicated to ecotourism as a tool for conservation and sustainable development.
*  Epler Wood recruits the first board of directors and Chairman, David Western in 1990. Western and Epler Wood raise the first grants for the Society.