Holden's natural history has been something that has fascinated visitors since the very beginning. Our summer program is always sprinkled with wildflower hikes, biologists, and geology presentations. Following is a collection of resources related to the plants, animals, and geology around Holden.

Holden Specific Resources to Download:
• Common Wildflowers, Trees and Shrubs of Holden, by Barbara Collins - .pdf, 2.51 MB
• Conifers Around Holden, by Joseph Arnett - .pdf, .79 MB
• Checklist of Birds, by Peggy Haug and Juanita Merrifield - .pdf, .47 MB
• Ten-Mile Falls Discovery Trail Guide, by Susan Ballinger - .pdf, 1.97 MB

Helpful Links to Check Out:
• Wildflowers and Scenery of Holden Village
• Geologic Map of the North Cascades Range
• Washington Native Plant Society
• North Cascades National Park
• Burke Museum, on-line photo herbarium
• WDFW Photo gallery, for animals in WA

Sessions on Holden's Audio Archive:
• Barbara Collins, presenter
• Philipp Kirsch, presenter
• Larry Collins, presenter: geology
• Reba Batalden, presenter: insect ecology
• Bob Lee, presenter: forestry
• Paul Weiblen, presenter: geology
• Don Coberley, presenter: geology