Just finished Brave The Wild River, about two botanists, Elzada Clover and Lois Jotter, who did the first complete botanizing of the Colorado River including Cataract, Glen and Grand Canyon on a boat trip in 1938, when very few people had ever completed the then-dangerous descent. 

They were also the first *women* to run the river. At the time, their gender got all the attention, the press ignoring their important scientific work in just one example of the pervasive sexism they faced as scientists. 

Author Melissa L. Sevigny does an excellent job of bringing the story of their epic lives together. It had me teary at the end. 

I started the (audio)book on the drive to a 6-day Cataract Canyon raft trip last month. As mentioned in the book, two previously unnamed canyons, tributaries of the Colorado in Cataract Canyon, are now informally called "Jotter" and "Clover" canyons by river guides who hope the names will stick. They pointed them out as we floated by.

https://melissasevigny.com/books/brave-the-wild-river/