Forbes Creek Watershed
| Forbes Creek | |
| Creek | |
 Aerial view of Kirkland with Forbes Creek watershed highlighted. North is up. Downtown Kirkland on Moss Bay is slightly left of center, Juanita Bay is at upper left. Forbes Lake is northeast of the I-405 cloverleaf.
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| Country | United States |
|---|---|
| State | Washington |
| Region | King County |
| City | Kirkland, Washington |
| Source | |
| - elevation | 360 ft (110 m) |
| - coordinates | 47°40′48.5″N 122°10′4″W / 47.680139°N 122.16778°W |
| Mouth | Juanita Bay Park |
| - location | Lake Washington |
| - elevation | 16 ft (5 m) |
| - coordinates | 47°41′56″N 122°12′39″W / 47.69889°N 122.21083°WCoordinates: 47°41′56″N 122°12′39″W / 47.69889°N 122.21083°W |
| Length | 2.5 mi (4 km) |
| Basin | 6.6 sq mi (17 km2) |
 Map showing the course of Forbes Creek, wetlands, and the approximate extent of its drainage area
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Forbes Creek is a small, moderately sloping creek wholly within the city of Kirkland, Washington. From its headwaters on the Rose Hill moraine to its outlet at Juanita Bay is c. 2 miles (3.2 km) as the crow flies. The northern extent of its basin is a nearly east-west line at NE 116th Street; the eastern boundary is at the Rose Hill ridgeline, roughly north-south at 132nd Avenue NE. The southern extent is irregular trending roughly from Kirkland's high point at the northeast corner of Bridle Trails State Park (535 ft (163 m), 47°39′26″N 122°10′21″W / 47.65722°N 122.17250°W) through South Rose Hill Park, to Lake Washington at 16 ft msl.
Two major branches of the creek rise on Rose Hill between NE 70th Street and NE 85th Street and then run south to north on Rose Hill. One rises in the vicinity of Lake Washington High School and runs north past Costco #008 to Forbes Lake. The other rises slightly to the east in the vicinity of Rose Hill Elementary School then through North Rose Hill Woodlands Park. The two join north of the lake then run west through a two-meter culvert under Interstate 405 near NE 100th Street, under the Cross Kirkland Corridor, into the Forbes Creek Valley and Juanita Bay Wetlands Park. The creek finally empties into Lake Washington at Juanita Bay, less than a kilometer from the mouth of Juanita Creek which empties into the same bay.
The Forbes Creek watershed is an 1,837-acre (743 ha) drainage basin covering a quarter of Kirkland's total land area. Forbes Creek empties into Lake Washington in the neighborhood of Juanita. Twenty two wetlands exist in the basin, comprising the greatest number and area of wetlands of any creek in Kirkland (there are no rivers).
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Wikipedia