Here's a part of his journal. He used to love hiking around Eaton Canyon.
In August 1877, naturalist John Muir set out from Pasadena for an expedition into the San Gabriels.
He writes: "On the first day of my excursion I went only as far as the mouth of Eaton Canyon,
because the heat was oppressive, and a pair of new shoes were chafing my feet to such an
extent that walking began to be painful."
You can read his full journal regarding the San Gabriels on the Sierra Club's website.
The San Gabriel Mountains
Lost Mines of Los Angeles County
"A mine is a hole in the ground, owned by a liar."