All fiction? I read a lot of non-fiction:

Aldo Leopold - A Sand County Almanac

Edward Abbey - Desert Solitaire (and others)

John McPhee - Rising from the Plains (and many others)

Bernd Heinrich - The Trees in my Forest (and others)

john Muir - assorted short pieces

Henry David Thoreau - The Maine Woods, Cape Cod, A Week on the Concord and Merrimack Rivers

Sue Hubbell - A Country Year

As for fiction, anything by Annie Proulx or John Steinbeck.