We are developing a master bibliography for the project, which will include all the sources used by researchers for their essays. You can find a working draft of the bibliography here. Let us know if there are other sources you think would be of value to us as we work on this project!
Historian Will Bagley has compiled an exhaustive and comprehensive bibliography of materials related to the overland trails. This document, Across the Plains, Mountains, and Deserts: A Bibliography of the Oregon-California Trail, 1812-1912. It is available online here: