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Personal life

In 1878, when he was nearing the age of 40, Muir's friends "pressured him to return to society". Soon after he returned to the Oakland area, he was introduced by Jeanne Carr to Louisa Strentzel, daughter of a prominent physician and horticulturist with a 2,600-acre (11 km) fruit orchard in Martinez, California, northeast of Oakland. In 1880, after he returned from a trip to Alaska, Muir and Strentzel married. John Muir went into partnership with his father-in-law John Strentzel, and for ten years directed most of his energy into managing this large fruit farm. Although Muir was a loyal, dedicated husband, and father of two daughters, "his heart remained wild", writes Marquis. His wife understood his needs, and after seeing his restlessness at the ranch would sometimes "shoo him back up" to the mountains. He sometimes took his daughters with him.

The house and part of the ranch are now the John Muir National Historic Site. In addition, the W.H.C. Folsom House, where Muir worked as a printer, is also listed on the National Register of Historic Places.

Muir became a naturalized citizen of the United States in 1903.