Albert "Bert" Loper was one of the most well known early river runners. The Albert "Bert" Loper photograph collection contains photographs and negatives documenting Loper's personal life and his river running adventures.

John Weisheit (1954-) is a Colorado river guide, writer, speaker, and advocate for river restoration. This collection contains copy prints of Colorado River history and photograph prints of trips down the river guided by Bert Loper and Georgie White.