Washington State Route 529

State Route 529 (SR 529, officially the Yellow Ribbon Highway) is a Washington state highway that connects the cities of Everett and Marysville. The 7.88-mile-long (12.68 km) roadway extends north from an interchange with Interstate 5 (I-5), numbered exit 193, past the western terminus of U.S. Route 2 (US 2), its spur route, Downtown Everett and Naval Station Everett to cross the Snohomish River onto Smith Island. After crossing the Steamboat Slough, the road encounters an interchange with I-5, numbered exit 198, before crossing the Ebey Slough and entering Marysville. In Marysville, SR 529 ends at SR 528. Before being realigned in 1991, SR 529 started at exit 192 of I-5 and traveled north as Broadway through Downtown Everett to Marysville.

A map published in 1895 of the Snohomish area showed the current and former routes in Everett already complete. By 1898, citizens of both Everett and Marysville were interested in a road that would traverse the Snohomish River delta. A 1911 map of the Mount Vernon area showed the route in Marysville, but the bridges between Everett and Marysville were railroad bridges. The roads were combined with other highways to form the Pacific Highway in 1913, which became State Road 1 in 1923 and US 99 in 1926, but the cutoff actually opened in 1927. State Road 1 became Primary State Highway 1 (PSH 1) in 1937 and PSH 1 became US 99 in 1964. After US 99 was decommissioned, SR 529 was established in 1971. Naval Station Everett was opened in 1991 and SR 529 was realigned on Everett Avenue and Marine View Drive to serve the new naval base. The former route of the highway, now named Broadway, had an interchange with I-5 that was reconstructed between 2005 and 2008 to include high-occupancy vehicle (HOV) lanes and now includes a single-point urban interchange with 41st Street.

SR 529 begins at exit 193 on I-5, a half-diamond interchange with Pacific Avenue in downtown Everett. The highway turns north on Maple Street and travels along the side of I-5, intersecting the western terminus of US 2 at Hewitt and California avenues near Judd and Black Park.

The roadway then west to become Everett Avenue, which continues east to I-5 as SR 529 Spur. Everett Avenue then travels west through Downtown Everett and intersects various streets including Broadway, which was once SR 529 and US 99, Hoyt Avenue, which is the location of the Everett Public Library, listed on the National Register of Historic Places, and Marine View Drive, where the road turns north to parallel a BNSF Railway route and serve the Everett waterfront, which includes Naval Station Everett and Jetty Island, accessed via a ferry near 10th Street.

Leaving the waterfront, SR 529 parallels the Snohomish River southeast to a partial cloverleaf interchange with Broadway, which was SR 529 before 1991 and US 99, and Marine View Drive, which continues southeast to I-5 at exit 195. The highway travels over the Snohomish River onto Smith Island, part of the Delta neighborhood of Everett that is named after the delta of the Snohomish River located to the southwest. The Snohomish River crossing was the busiest segment of SR 529 in 2007, with an estimated daily average of 33,000 motorists. Crossing the Steamboat Slough as a freeway, SR 529 interchanges with I-5 northbound as exit 198 and enters Marysville after crossing the Ebey Slough. Now named State Avenue, the street passes through the waterfront area of Downtown Marysville and the Marysville Mall before ending at the intersection with Fourth Street, signed as SR 528 while State Avenue continues north to Smokey Point.

Prior to 1991, SR 529 was 1.19 miles (1.92 km) shorter and extended from I-5 and 41st Street (exit 192) to Marysville via Broadway. The former and current routes both used the same route from the Marine View Drive intersection to Marysville. The former southern terminus was a large interchange with I-5 and 41st Street, which was SR 526 until 1969, that had an underpass under I-5 southbound for a northbound I-5 offramp to Broadway and connections to I-5 northbound were accessed via 41st Street prior to 2005. Broadway continued north past the Everett Memorial Stadium, home of the Everett AquaSox, Everett Avenue (current SR 529) and the Everett Community College to join current SR 529 at the Marine View Drive interchange. Between 2005 and 2008, exit 192 on I-5 was reconstructed. A new flyover ramp from I-5 northbound to Broadway northbound was added and the 41st Street interchange was transformed into a single-point urban interchange.

As early as 1915, citizens of both Everett and Marysville proposed that a road between the two cities across the Snohomish River delta was needed. At the time, the only route between the two cities was a winding road traveled around the northeast side of the delta. The first bridge across the delta was opened the following year, connecting Everett to Smith Island.

In 1913, the Pacific Highway was added to the state highway system and used Broadway (former SR 529) in Everett and State Avenue in Marysville to travel between Seattle and the Canada–US border. The Pacific Highway between Everett and Marysville, named the Vernon Road, was paved in 1916 and paid by a county road bond issue. The highway was later signed as State Road 1 in 1923, which became the Washington segment of U.S. Route 99 (US 99) during the creation of the United States Numbered Highways in 1926. Since the bridges over the Snohomish River delta weren't complete at the time of planning, US 99 used present-day US 2, SR 204 and Sunnyside Boulevard to connect Everett and Marysville. The bridges were completed in 1926 and opened on August 23, 1927, after the creation of US 99.