Girdwood, AK

ZIP code 99587 encompasses the remote Alaskan community of Gakona. Located in the Copper River Valley, this area is known for its stunning natural beauty and proximity to Wrangell-St. Elias National Park. The most notable landmark in this ZIP code is the High-Frequency Active Auroral Research Program (HAARP) research facility, which conducts scientific experiments related to radio communications and the ionosphere.