Gregory Nickerson has given public presentations across Wyoming, and in Lake Tahoe, Portland, and Philadelphia. For many years he was part of the speakers bureau of the Wyoming Humanities Council, and he has chaired panels at the Western History Association Conference.

His presentations on Yellowstone art history, Wyoming railroads, and wildlife migration have have been hosted by groups ranging from Pullman railroad car owners, members of the National Bighorn Sheep Center, and audiences at the National Museum of Wildlife Art.