The US. long-term ecological research network consists of 28 research programs with a rich history of ecological inquiry and collaboration. Bringing together diverse groups of researchers with sustained data collection and ecosystem manipulation experiments, these sites allow each new generation of scientists to apply new tools and explore new questions in systems where the context is well understood, shared, and thoroughly documented. Site profiles contain key information on research, history, people, institutional affiliations, and location for each LTER site as well as links to additional site information.