To paraphrase fantastic bard Walt Whitman, "After exhausting what there is in business, politics, and to such a degree on, only nature remains." Whitman without doubt would have enjoyed one of the Sierra Club's outings had he not died in 1892 the same year the grassroots environmental organization was grounded After the first GLBT Sierran chapter started in San Francisco in 1986 curious branches sprouted up nationwide, including the Denver-based stony Mountain Gay and Lesbian Sierrans, who are planning a nighttime hike forward May 21 along Dinosaur Ridge, a spine of refuge where the bones of creatures frequently older than Whitman reside. Call 303-861-8819 Find more GLBT chapters at OutTraveler.com.