State Route 1 South - Gateway to Chugiak

Phase 2 of the Glenn Highway MP 34-42 Reconstruction Project expanded SR 1 (Glenn Highway) to a four lane, divided highway between S Inner Springer Loop in Palmer and SR 3 (Parks Highway) at Gateway. Construction was scheduled to run from Summer 2023 to September 2025.¹
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State Route 3 travels west from SR 1 at Gateway to suburban areas of Wasilla, Meadow Lakes and Houston. Known entirely as George Parks Highway, SR 3 joins Anchorage with Fairbanks along a 323.72 mile long course.
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SR 3 (Parks Highway) initially follows a freeway west five miles from SR 1 (Glenn Highway) to Seward Meridian Parkway in Wasilla. All of the state route is unsigned Interstate A4.
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An at-grade connection links SR 3 (Parks Highway) south with SR 1 (Glenn Highway) northbound.
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SR 1 (Glenn Highway) overtakes the freeway along SR 3 (Parks Highway) south at a wye interchange preceding Rabbit Slough.
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Downtown Anchorage is 35 miles southwest from the exchange with SR 3 (Parks Highway) at Gateway.
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SR 1 (Glenn Highway) across the Matanuska River is the Vietnam Helicopter Pilots' Memorial Bridge.
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The Matanuska River parallels SR 1 (Glenn Highway) west from Sheep Mountain and Glacier View into Knik Arm south of Gateway.
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East and West Twin Peaks rise south of the Matanuska Valley within the Chugach Mountains.
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The diamond interchange with the Knik River Access Road lies on an island between the Matanuska and Knik Rivers.
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SR 1 (Glenn Highway) proceeds south across the Knik River west of the Alaska Railroad.
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Waters on the Knik River flow west into the open waters of Knik Arm.
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Old Glenn Highway (former SR 1) loops 18.41 miles northeast to Palmer.
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A trumpet interchange joins this section of Old Glenn Highway with SR 1.
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SR 1 traverses areas of wetlands at the Eklutna Flats. The Talkeetna Mountains appear along the northern horizon.
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The succeeding exit along SR 1 south is for Eklutna Village Road and the Eklutna native village.
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The Eklutna Village Road overpass is slightly below Interstate standards with 15 foot 10 inches of clearance.
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SR 1 spans the Alaska Railroad just ahead of the diamond interchange with Eklutna Village Road.
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SR 1 lowers to cross the Eklutna River beyond this southbound confirming marker.
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SR 1 (Glenn Highway) advances south from Eklutna into the Chugiak community in north Anchorage.
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The succeeding exit links with an access road east to a section of Old Glenn Highway south to Mirror Lake.
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The diamond interchange at north Peters Creek connects SR 1 with Old Glenn Highway at Lake Hill Drive to the west.
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Adjacent Settlers Drive runs south from Mirror Lake to Homestead Road.
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Old Glenn Highway shifts sides with SR 1 through a diamond interchange with the freeway at Peters Creek.
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Old Glenn Highway turns west at Ski Road and east at Glenway Drive and Voyles Boulevard through Peters Creek.
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Birchwood Loop Road circles 6.57 miles west from Old Glenn Highway to through the Chugiak and Birchwood communities in north Anchorage.
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SR 1 south enters the first of two diamond interchanges with Birchwood Loop Road just beyond Peters Creek.
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