The communities stretching north of Seattle along the I-5 corridor and Lake Washington's shore hide some genuinely unexpected history and geography. Here are a few facts you probably haven't heard before:

• Kenmore's seaplane legacy: Kenmore Air, founded in 1946 at the north tip of Lake Washington, operates the oldest continuously running seaplane airline in the United States — meaning Kenmore has had scheduled float-plane service longer than most American cities have had commercial jet service.
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• Ballard's independent past: Ballard was its own incorporated city — not a Seattle neighborhood — until 1907, when it was annexed largely because its residents wanted access to Seattle's superior water system after a serious typhoid outbreak tied to its own water supply.
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• Bitter Lake's name is literal: The small lake that gave the Bitter Lake neighborhood its name actually earned the designation because early settlers found its water noticeably alkaline and unpleasant to taste, not because of any sad event or person associated with it.
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• Mountlake Terrace's curfew cannon: For decades, Mountlake Terrace enforced a youth curfew by firing a loud cannon-like device each evening — a practice so locally distinctive that long-time residents still reference the sound as a defining childhood memory of growing up there.
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• Northgate's mall milestone: Northgate Mall, which opened in 1950, is widely credited by urban historians as the first regional shopping mall in the United States — predating the more famous Southdale Center in Minnesota by six years.

The Kenmore Air Harbor Parking Secret Almost Nobody Uses

If you need a free, legal, and scenic place to park for a few hours while running errands between Kenmore and Bothell, pull into the public shoreline access lot near Kenmore's Log Boom Park during off-peak weekday mornings. Locals have figured out that this spot empties out completely by 9 a.m. after the early dog walkers leave, giving you a completely uncharged, time-unlimited spot to use as a base while you hop between Kenmore and Lake Forest Park shops without feeding a single meter.

The real insider layer: the Burke-Gilman Trail runs directly behind this area, meaning you can lock your car and bike or scoot all the way down through Lake Forest Park, into Kenmore's side streets, and even push north toward Bothell without moving your car once. Residents who discovered this treat it like a personal transit hub — park once, cover four neighborhoods, and return whenever you want. Most people driving through these corridors never realize the trail access point is sitting right there, unmarked and underused.