Olivine Bridge Natural Area Preserve

This one-of-a-kind site, with its unique geologic formation, represents an example of native vegetation on serpentine soils at low elevations in the western Cascades.  Ultramafic rocks such as serpentine (an olive-green, heavy rock) are high in certain minerals such as iron and magnesium, and weather to produce harsh, relatively sterile soils.  These soils are typically inhabited by a relatively small number of plant species, some of them specially evolved, that can tolerate these conditions. Dwarfed trees, junipers and serpentine ferns highlight the odd plants, which persist at Olivine Bridge NAP. The 148 acre preserve also supports a mixed conifer forest. 
Features Protected: Lodgepole pine – kinnikinnick forest community
Ecoregion: North Cascades (Skagit County) 

Science, Research and Monitoring

Public and private universities, other research institutions and individual researchers may contact DNR to propose a research project at the site. If you are interested in pursuing research at Olivine Bridge NAP, please contact David Wilderman, natural areas ecologist, at david.wilderman@dnr.wa.gov.  
Examples of research and monitoring projects 

Environmental Education and Public Access

Currently no formal educational programs are available at Olivine Bridge NAP. The site is not ADA accessible and facilities are not available. For more information, contact the DNR Northwest Region natural areas manager.