Seward Highway Bridge - Chickaloon Bay

The Seward Highway Bridge over the Twentymile River provides a basic boat launch site for kayakers, canoeists, and small motorized boats. Located about an hour south of Anchorage, this access point offers a dirt boat ramp on either side of the highway bridge.

The Twentymile River is a medium-sized stream with an average flow of about 10 cubic feet per second and a total elevation drop of over 3,400 feet along its 22-mile length. The river's relatively gentle 152-foot-per-mile gradient makes it a suitable waterway for recreational boating, though the lack of developed facilities means paddlers and boaters should exercise caution when launching.

There are no restrooms, parking fees, or other amenities at this site. Nearby campgrounds like Williwaw and Black Bear provide basic camping options for those looking to explore the Twentymile River and the surrounding Chugach National Forest. Paddlers and boaters should plan accordingly and be prepared for the remote, rugged nature of this access point on Alaska's Seward Highway.