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Seattle, Washington / Landmarks

Hiram M. Chittenden Locks

The largest and most heavily used locks on the West Coast, connecting Lake Washington and Lake Union to Puget Sound through a historic engineering marvel of the Ballard district.

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Hiram M. Chittenden Locks
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What is the Hiram M. Chittenden Locks known for?

The locks are the largest and most heavily used locks on the West Coast and are one of Seattle's most popular tourist attractions. They were completed in 1917 to connect Lake Washington and Lake Union to Salmon Bay and Puget Sound via the Ship Canal.

How much does it cost to visit?

The locks are free to visit.

What are the hours?

The grounds are open daily from 7 a.m. to 9 p.m., and the fish ladder viewing room is open from 7 a.m. to 8:45 p.m. Vessel traffic operates 24/7.

When is the Visitor Center open?

The Visitor Center is open Wednesday through Sunday. From May 1 to September 30, it is open 10:00 a.m. to 6:00 p.m., and from October 1 to April 30, it is open 10:00 a.m. to 3:00 p.m.

Are there tours available?

Yes, free daily tours of the Locks, Botanical Garden, and Fish Ladder run for about one hour starting at 2:00 p.m. from May 1 to September 30, Wednesday through Sunday.

What should I check before going?

Use Gyde for context, then check official sources for current hours, tickets, construction, and closures.

What to know

The Hiram M. Chittenden Locks, completed in 1917 by the U.S. Army Corps of Engineers, serve as a critical link between Lake Washington, Lake Union, and Salmon Bay leading to Puget Sound. This engineering feat transformed Seattle into a major metropolitan port city by allowing vessels to navigate the Ship Canal. The facility incorporates unique, parallel dual-sized lock chambers specifically designed for water conservation and to prevent saltwater intrusion into the freshwater lakes. Beyond the industrial utility, the site is a public park destination featuring the Carl S. English, Jr. Botanical Gardens and a dedicated fish ladder. The fish ladder viewing room allows visitors to observe salmon returning to their spawning grounds, providing a biological contrast to the mechanical precision of the locks. Recognized for its historical significance, the locks were listed on the National Register of Historic Places in 1978. They have also been designated as a National Historic Civil Engineering Landmark by the American Society of Civil Engineers. Today, the site remains one of Seattle's most popular tourist attractions, generating significant regional economic benefit.

Visitor tips

  • Visit the fish ladder viewing room, which is open from 7 a.m. to 8:45 p.m. daily.
  • If visiting between May 1 and September 30, look for free daily tours starting at 2:00 pm on Wednesday through Sunday.
  • The grounds are open daily from 7 a.m. to 9 p.m., offering a free experience for all visitors.
  • Plan your visit to the Visitor Center, which has seasonal hours: 10:00 a.m. to 6:00 p.m. (May-Sept) or 10:00 a.m. to 3:00 p.m. (Oct-April), Wednesday through Sunday.

Nearby context

Located in northwest Seattle's Ballard district, north of downtown, the locks provide a scenic gateway between the city's inland lakes and the saltwater of the Puget Sound.

Sources

Evidence and links