Washington State Route 706

Washington State Route 706

Washington State Route 706 is a short state highway in Pierce County, Washington that connects the urban and suburban edge of Tacoma and Elbe to the visitor access points at Mount Rainier National Park near Longmire. The route provides a direct link from the regional arterial I-5 corridor via SR 7 and serves commuters, tourism traffic, and freight moving toward recreational and forestry areas. As a seasonal gateway to Mount Rainier, the highway intersects regional, historical, and environmental points of interest tied to Cascade Range, Puget Sound, and national park infrastructure.

Route description

SR 706 begins near the urban growth boundary south of Tacoma at an interchange with SR 7 near the community of Elbe and proceeds eastward through mixed residential, commercial, and industrial zones that abut the Puyallup River. The alignment parallels local routes used by logging companies and recreational travelers moving toward Mount Rainier National Park and crosses tributaries feeding into the White River and drainage basins of the Puyallup River. Along its course SR 706 traverses the community of Elbe, passes the historic Tacoma Narrows Airport vicinity, and runs adjacent to lands influenced by the Northern Pacific Railway corridor and timber operations tied to companies once associated with Weyerhaeuser. Approaching the western boundary of Mount Rainier National Park, SR 706 climbs through foothill terrain shaped by past glacial activity in the Cascade Range, interfacing with park entrance facilities near Longmire and terminating at park-managed roads that continue to destinations such as Paradise and Sunrise.

History

The corridor that became SR 706 traces roots to early wagon roads used by settlers connecting Tacoma to inland timberlands during the late 19th century when entities such as the Northern Pacific Railway and individuals like Tacoma entrepreneurs expanded resource extraction. In the 1920s and 1930s, improvements were made as automobile travel to Mount Rainier National Park increased, influenced by conservation and tourism movements associated with figures and institutions like John Muir and the National Park Service. Official designation as a state route came during the 1964 Washington state highway renumbering that reorganized alignments including SR 7 and other Pierce County corridors. Over subsequent decades, SR 706 experienced periodic upgrades tied to federal and state investment programs such as those promoted by the Federal Highway Administration and regional planning by the Puget Sound Regional Council. The route has been repeatedly affected by natural events, including storm-related debris flows and spring snowmelt linked to Mount Rainier glacial dynamics, prompting emergency repairs and resilience projects often coordinated with the Washington State Department of Transportation and Mount Rainier National Park authorities.

Major intersections

- Western terminus: Intersection and interchange with SR 7 near Elbe and access to I-5 corridors that serve Tacoma and Seattle metropolitan area traffic. - Local junctions: Crossings and connections to county roads serving Eatonville area, logging access roads connected historically to Weyerhaeuser timberlands and rail spurs once operated by Northern Pacific Railway. - Eastern terminus: Park boundary and entrance facilities for Mount Rainier National Park providing onward routes to Longmire, Paradise, and Sunrise managed by the National Park Service.

Traffic and usage

SR 706 carries a mix of commuter, commercial, and tourism traffic, with seasonal peaks tied to summer visitation at Mount Rainier National Park and winter recreation periods influenced by snow access to Paradise. Traffic counts collected by the Washington State Department of Transportation show higher average annual daily traffic (AADT) near the western terminus adjacent to Tacoma and lower—but highly variable—volumes near the eastern park boundary. Freight movements related to timber and construction materials historically referenced companies like Weyerhaeuser and rail interchanges with lines from the Northern Pacific Railway era contribute to off-peak heavy vehicle percentages. Incidents such as winter storms, spring floods, and landslides tied to Mount Rainier hydrology have periodically closed the route, prompting coordinated incident response with agencies including the Pierce County emergency management and the Washington State Patrol.

Future developments and improvements

Planned and proposed improvements on SR 706 focus on resilience, safety, and multimodal access to support continued tourism and local mobility. Projects considered by the Washington State Department of Transportation and regional partners include roadway stabilization to mitigate debris flows influenced by Mount Rainier glacial melt, shoulder widening for bicycle and pedestrian accommodation consistent with Puget Sound Regional Council recommendations, and intersection upgrades at the SR 7 junction to improve connectivity with I-5 and reduce congestion impacting Tacoma commuter routes. Coordination with the National Park Service addresses visitor capacity and transit operations, potentially involving shuttle services similar to programs in other national parks overseen by entities like the Federal Transit Administration and environmental review under statutes administered by the United States Forest Service and federal partners. Adaptive management strategies account for climate-related changes documented in studies by institutions such as University of Washington and Pacific Northwest National Laboratory to ensure continued safe access to Mount Rainier National Park.

Category:State highways in Washington (state) Category:Transportation in Pierce County, Washington