US-Parks.com: America's National Parks and Road Trip Planning Find Your Park Road Trip Activities Nature

Point Reyes National Seashore Air Quality

Point Reyes National Seashore is a Class I park and air quality is generally good due to the prevailing westerly marine flows. However, during periods when atmospheric conditions displace the east Pacific high pressure system, air flows from the San Francisco Bay area can degrade the air quality of the seashore. This mainly occurs during the late summer and early fall, when the major atmospheric systems undergo a seasonal change. During this time, the seashore is often impacted by a general haze, which significantly impairs visibility.

Because ambient ozone levels at Point Reyes National Seashore are currently quite low, oxidant injury in vegetation is unlikely at the present time. If there were to be changes in the atmospheric patterns at the Seashore, there are approximately 37 plant and lichen species with known sensitivities to sulfur dioxide, ozone, and nitrogen oxides.

Featured Outdoor Gear

$200
The Archeon 24L Backpack from Osprey handles our on-the-go lifestyles with ease, seamlessly transitioning between work...
Price subject to change | Available through Backcountry.com

National Park Spotlight
Bryce Canyon National Park
Bryce Canyon National Park
Featured Wildlife
Maine Puffins
Maine Puffins


Maine ocean islands provide the only nesting sites for Atlantic puffins in the United States. Eastern Egg Rock in the midcoast region, Seal Island and Matinicus Rock at the mouth of Penobscot Bay, and Machias Seal Island and Petit Manan Island off the downeast coast provide habitat for more than 4,000 puffins each summer.