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Based in Boulder, Colorado, IPCAS has been promoting and participating in Colorado Archaeology for fifteen years. We organize a series of lectures, host tours, provide volunteer opportunities, and publish a monthly newsletter, the Calumet newsletter.

We sponsor ten lectures per year on a variety of topics ranging from edible wild foods to Pleistocene bone assemblages. In 1994 we hosted the CAS Research Symposium on High Altitude Archaeology featuring, among others, Dennis Stanford, George Frison, Jim Benedict, Steve Cassells, Bonnie Pitblado and Kathryn Mauz.

Each summer we make available to Colorado Archeologists thousands of hours of our skilled volunteer labor, on projects such as Caribou Lake, Devil's Thumb, Pawnee Grasslands, Comanche Creek and many others, run by a wide variety of institutions, agencies and individuals.