"A Lady's Life in the Rocky Mountains" by Isabella L. Bird
Surprisingly this is a good book. It was written in the 1870's about a 40+ year old women in Colorado riding around and seeing the country. She tells the struggles and adventures of different people. It is interesting to see how some prosper and others suffer. She describes nature as she rides. She climbs Longs Peak or should I say she was carried to the top of Longs Peak. But she was no tender foot. A lot of the time she traveled alone and endured much hardship and freezing cold.
I would recommend if you want to read a journal type book.
It is easy reading and is one of the Western Frontier Library books. 2 3 4 Not all books are listed but here is a few I found searching.
My wife found the book in a thrift store.
Click on the photo to enlarge it.