A map of the Mountain Loop Highway with paved sections highlighted in red and the unpaved section highlighted in blue
Route information
Maintained by Snohomish County and USFS
Length
54 mi[3] (87 km)
Includes 14-mile (23 km) unpaved section
Existed
March 23, 1936 (Construction begins) December 1941 (Highway opened)[2]–present
Major junctions
West end
SR 92 in Granite Falls
East end
SR 530 in Darrington
Location
Country
United States
State
Washington
Highway system
Forest Highway System
State highways in Washington
Interstate
US
State
Scenic
Pre-1964
1964 renumbering
Former
The Mountain Loop Highway is a scenic byway in the U.S. state of Washington. It traverses the western section of the Cascade Range within Snohomish County. The name suggests it forms a full loop, but it only is a small portion of a loop, which is completed using State Routes 92, 9, and 530. Part of the highway is also a designated and signed Forest Highway, and is known as Forest Route 20.[1]
The highway connects the towns of Granite Falls and Darrington. It is paved for 34 miles (55 km) from Granite Falls to Barlow Pass (2349') where the highway becomes unpaved for 13 miles (21 km), and then paved again for the remaining 9 miles (14 km) to Darrington. The unpaved section is U.S. Forest Service Road #20 and passes several USFS campgrounds. Portions of the unpaved section are often closed for periods of several years due to flood damage.
Between Granite Falls and Barlow Pass, the highway passes Big Four Mountain and the trailhead leading to the Big Four Ice Caves at its base. At Barlow Pass, a gravel road maintained by Snohomish County[4] (closed to motor vehicles) branches from the highway and leads to the former silver mining town of Monte Cristo. The portion from Granite Falls to Barlow Pass follows the Stillaguamish River. The portion from Barlow Pass to Darrington follows the Sauk River. The "inside" of the highway's namesake loop is a large area containing significant Cascade peaks, including Three Fingers (6,850 ft; 2,090 m), Whitehorse Mountain (6,850 ft; 2,090 m), Mount Dickerman (5,723 ft; 1,744 m), and Mount Forgotten (6,005 ft; 1,830 m).
The MountainLoopHighway is a scenic byway in the U.S. state of Washington. It traverses the western section of the Cascade Range within Snohomish County...
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nine-mile (14.5 km) highway connects SR 9 in Lake Stevens to the Mountain LoopHighway in Granite Falls. SR 92 follows the general route of the Monte Cristo...
metropolitan area freeway system. Loop 202 has three officially designated sections along its route; the Red Mountain Freeway, the SanTan Freeway, and...
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valley from I-17 to Loop 202 (Red Mountain Freeway) Price Freeway in the east valley from Loop 202 (Red Mountain Freeway) to Loop 202 (Santan Freeway)...
is located four miles south of Darrington, Washington, along the MountainLoopHighway. It is situated in the Boulder River Wilderness on land administered...
Mountain, is a mountain in Mount Baker-Snoqualmie National Forest in Washington state. It is located northwest of Barlow Pass along the MountainLoop...
It is located southeast of Darrington, Washington, east of the MountainLoopHighway, and northwest of Glacier Peak which is one of the Cascade stratovolcanoes...
through downtown on Seeman Street. The highway turns north onto Emmens Street at a junction with the MountainLoopHighway, which continues south to Granite...
Vesper Peak is a peak along the MountainLoopHighway region of the North Cascades of Washington state. It is about 18 miles (29 km) south of Darrington...
(also known as circular road, beltline, beltway, circumferential (high)way, loop or orbital) is a road or a series of connected roads encircling a town, city...
southern terminus is at SH 35 near Blessing. This highway is designated the "10th Mountain Division Highway" from SH 95 to Interstate 35. SH 71 was originally...
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abandoned in 1933 and the tracks torn up in 1936. Today, much of the MountainLoopHighway from Verlot to Barlow Pass runs on the abandoned railroad grade...
Interstate Highway shield. The word BUSINESS is used instead of INTERSTATE, and, above the number, where the state name is sometimes included, the word LOOP or...
of mountains known as the Columbia Mountains. A scenic highwayloop, the International Selkirk Loop, encircles the southern portions of the mountain range...
Washington state. The peak is located southeast of Barlow Pass along the MountainLoopHighway, and two miles east of the historic Monte Cristo area. It is situated...
the MountainLoopHighway near the Monte Cristo area. It is situated on land administered by the Mount Baker-Snoqualmie National Forest. The mountain is...
Global Information
SR 92 in Granite Falls
SR 530 in Darrington