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The following references may be useful when improving this article in the future: Scenic and Recreational Highway Study, 1974 State Scenic & Recreational Highways Plan (2010)

Per RCW 47.39.020 and 2010 map. Names of byways noted where available:

• US 2 from Monroe to Peshastin — Stevens Pass Greenway, Cascade Loop
• US 2 from SR 17 near Coulee City to SR 155 — Coulee Corridor
• SR 3 from Shelton to Port Gamble (full route)
• SR 4 from US 101 to Coal Creek Road near Longview
• I-5 from Starbird Road near Stanwood to Bow Hill Road near Burlington — Skagit Agricultural Corridor
• SR 6 from US 101 to I-5 (full route)
• SR 7 from US 12 to SR 507
• SR 8 from US 12 to US 101 (full route)
• SR 9 from SR 530 in Arlington to Canadian border
• SR 10 from Teanaway to US 97 (full route) — Swiftwater Corridor
• SR 11 from Burlington to Bellingham (full route) — Chuckanut Drive
• US 12 from Montesano to Elma
• US 12 from I-5 near Napavine to SR 410 near Naches
• US 12 from SR 124 to SR 129 — Lewis and Clark Trail
• SR 14 from Washougal to Plymouth — Columbia Gorge, Lewis and Clark Trail
• SR 17 from US 395 to US 97 (full route)
• SR 19 from SR 104 to SR 20 (full route)
• SR 20 from US 101 to Port Townsend
• SR 20 from Keystone to SR 153
• SR 20 from US 97 to SR 215 near Okanogan
• SR 20 from US 97 in Tonasket to US 2 in Newport — Sherman Pass
• SR 25 from Spokane River Bridge to Canadian border
• SR 26 from Whitman County line to US 195 — Palouse
• SR 27 from US 195 to Rockford — Palouse
• SR 31 from SR 20 to Canadian border (full route) — North Pend Oreille
• I-82 from US 395 to Oregon border — Lewis and Clark Trail
• I-90 from Issaquah to Thorp Road — Mountains to Sound Greenway (NSB)
• US 97 from Oregon border to I-82 at Union Gap — Yakama
• US 97 from SR 10 to US 2
• US 97 from SR 153 to Canadian border
• US 97 Alternate from US 2 to US 97 (full route) — Cascade Loop
• US 101 from Oregon border to Raymond — Pacific Coast
• US 101 from unbuilt SR 109 at Queets to I-5 — Pacific Coast
• SR 104 from US 101 to Kingston
• SR 105 from Raymond to Aberdeen (full route, including spur) — Cranberry Coast
• SR 109 from Hoquiam to Queets (full route, including unbuilt section) — Hidden Coast
• SR 112 from Makah Reservation to US 101 (full route) — Juan de Fuca (NSB), Cape Flattery Tribal (partial)
• SR 116 from Chumacum-Beaver Valley Road to Fort Flagler State Park
• SR 119 from US 101 to Mount Rose trailhead (full route)
• SR 122 (Harmony Road) from Mayfield to Mossyrock (full route)
• SR 123 from US 12 to SR 410 (full route)
• SR 129 from Oregon border to US 12 (full route)
• SR 141 from SR 14 to Skamania County (full route)
• SR 142 from SR 14 to US 97 (full route)
• SR 153 from US 97 to SR 20 (full route) — Cascade Loop
• SR 155 from US 2 to SR 215 (full route, including spur)
• SR 194 from Almota to US 195 (full route) — Palouse
• US 195 from Idaho border to Whitman–Spokane county line — Palouse
• SR 202 from SR 522 to I-90 (full route) — Cascade Valleys
• SR 211 from US 2 to SR 20 (full route)
• SR 215 from SR 20 to US 97 (full route)
• SR 231 from SR 23 to US 2 near Reardan
• SR 261 from US 12 to SR 260
• SR 262 from SR 26 to SR 17 (full route)
• SR 271 from SR 27 to US 195 (full route) — Palouse
• SR 272 from US 195 to Idaho border (full route) — Palouse
• SR 278 from SR 27 to Idaho border (full route) — Palouse
• SR 305 from Winslow to SR 3 (full route)
• US 395 from Colville to SR 20
• SR 401 from US 101 to SR 401 (full route) — Lewis and Clark Trail
• SR 410 from Enumclaw to Naches — Chinook
• SR 501 from I-5 to Vancouver Lake (full route)
• SR 503 from SR 500 to I-5 (full route, not including spur)
• SR 504 from I-5 to Johnston Ridge (full route) — Spirit Lake
• SR 505 from SR 504 to I-5 (full route)
• SR 508 from I-5 to SR 7 (full route)
• SR 525 from Clinton ferry to SR 20 — Whidbey
• SR 542 from I-5 to Austin Pass (full route) — Mount Baker
• SR 547 from SR 542 to SR 9 (full route)
• SR 706 from SR 7 to Mt Rainier National Park (full route)
• SR 821 from Selah to Thrall (full route) — Yakima River Canoyon
• SR 971 (Navarre Coulee) from US 97 Alternate to South Lakeshore Road
• All ferry routes
• SR 20 Spur "as described in San Juan County Council Resolution 7, adopted February 5, 2008"

SounderBruce 06:42, 11 April 2022 (UTC)[reply]