Alaska Route 1 (AK-1) is a state highway in the southern part of the U.S. state of Alaska. It runs from Homer northeast and east to Tok by way of Anchorage. It is one of two routes in Alaska to contain significant portions of freeway: the Seward Highway in south Anchorage and the Glenn Highway between Anchorage and Palmer.

AK-1 is also known by the named highways it traverses:

• Sterling Highway from Homer to Tern Lake Junction
• Seward Highway from Tern Lake Junction to Anchorage
• Glenn Highway from Anchorage to Glennallen
• Richardson Highway from Glennallen and Gakona Junction
• Tok Cut-Off from Gakona Junction to Tok

AK-1 begins at the Alaska Marine Highway's Homer Ferry Terminal at the tip of Homer Spit just south of the end of the Sterling Highway in Homer. It follows the entire Sterling Highway through Soldotna to the junction with the Seward Highway north of Seward, where it meets the north end of AK-9. There it turns north and follows the Seward Highway to its end in Anchorage, and follows the one-way pairs of Ingra and Gambell Streets and 6th and 5th Avenues, continuing east on 5th Avenue to the beginning of the Glenn Highway. AK-1 follows the entire length of the Glenn Highway, passing the south end of the George Parks Highway (AK-3) near Wasilla and meeting the Richardson Highway (AK-4) near Glennallen. A short concurrency north along AK-4 takes AK-1 to the Tok Cut-Off, which it follows northeast to its end at the Alaska Highway (AK-2) at Tok.

The majority of AK-1 is part of the Interstate Highway System; only the route between Homer and Soldotna does not carry an unsigned Interstate designation. The entire length of A-3 follows AK-1 from the Kenai Spur Highway in Soldotna to the turn in downtown Anchorage; there A-1 begins, running to Tok along AK-1. (A-1 continues to the Yukon border along AK-2, the Alaska Highway.) Only a short portion of the Seward Highway south of downtown Anchorage and a longer portion of the Glenn Highway northeast to AK-3 are built to freeway standards; the proposed Highway to Highway Connection would link these through downtown.

All exits are unnumbered.

Borough	Location	mi	km	Destinations	Notes
Kenai Peninsula	Homer	0.00	0.00	Land's End Resort	Dead end
		0.09	0.14	Homer Ferry Terminal	To Alaska Marine Highway
				Heath Street	Southern terminus of Sterling Highway
	Soldotna	81.03	130.41	Kenai Spur Highway north – Kenai	Southern terminus of Interstate A3
	Chugach National Forest	138.18	222.38	AK-9 south (Seward Highway) – Seward	Northern terminus of AK-9; AK-1 transitions to Seward Highway
				Hope Highway north – Hope
Municipality of Anchorage		179.72	289.23	Portage Glacier Road east – Whittier, Portage Glacier
				Old Seward Highway north
		218.39	351.46	Southern terminus of freeway section
		218.81	352.14	Old Seward Highway / Rabbit Creek Road
		219.37	353.04	DeArmoun Road	Southbound exit and northbound entrance
		220.48	354.83	Huffman Road
		221.45	356.39	O'Malley Road	To Ted Stevens Anchorage International Airport
		222.96	358.82	Dimond Boulevard
		223.66	359.95	76th Avenue	Southbound exit and northbound entrance
		224.46	361.23	Dowling Road	Dumbbell interchange
		225.46	362.84	Tudor Road
		226.01	363.73
				Old Seward Highway south	Interchange; southbound exit only
				Northern terminus of freeway section
				20th Avenue	Northern terminus of Seward Highway
				Mountain View Drive	Southern terminus of Glenn Highway
				Southern terminus of freeway section
		230.04	370.21	Bragaw Street
		231.08	371.89	Boniface Parkway / Mountain View Drive – JBER-Elmendorf
		231.84	373.11	Turpin Street	Northbound exit and entrance
		232.66	374.43	Muldoon Road	DDI interchange
		234.22	376.94	Arctic Valley Road	Northbound exit and southbound entrance
		235.71	379.34	JBER-Richardson, Arctic Valley	Via D Street
		239.70	385.76	Eagle River Loop Road / Hiland Road
		241.45	388.58	Eagle River	Via Old Glenn Highway
		243.30	391.55	North Eagle River	Via North Eagle River Access Road
		245.31	394.79	South Birchwood	Via South Birchwood Loop Road
		248.73	400.29	North Birchwood	Via Birchwood Loop Road
		249.73	401.90	Peters Creek	Via Voyles Boulevard
		250.75	403.54	North Peters Creek	Via Lake Hill Drive
		252.03	405.60	Mirror Lake	Via Old Glenn Highway and Paradis Lane
		253.17	407.44	Thunderbird Falls	Via Old Glenn Highway; northbound exit and entrance
		254.05	408.85	Eklutna	Via Eklutna Village Road
		257.57	414.52	Old Glenn Highway
Knik River				SFC James Bondsteel Bridge of Honor
Matanuska-Susitna	​	259.06	416.92	Knik River Access
	Palmer	263.32	423.77	AK-3 north – Wasilla, Fairbanks	Southern terminus of AK-3 (George Parks Highway)
				Northern terminus of freeway section
				Palmer-Wasilla Highway / Evergreen Avenue
Unorganized	Glennallen	409.54	659.09	AK-4 south (Richardson Highway) – Valdez	Southern terminus of AK-4 concurrency; northern terminus of Glenn Highway and Interstate A3
	Gakona	423.54	681.62	AK-4 north (Richardson Highway) – Fairbanks	Northern terminus of AK-4 concurrency; southern terminus of Tok Cutoff Highway
	Tok	545.92	878.57	AK-2 (Alaska Highway) – Fairbanks, Canadian Border
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access       Route transition

Tok Cut-Off
Location	Gakona—Tok
Length	125 mi (201 km)
Existed	c. 1940–present

The Tok Cut-Off is a highway in the U.S. state of Alaska, running 125 miles (201 km) from Gakona (on the Richardson Highway, 14 miles (23 km) north of Glennallen), to Tok on the Alaska Highway which had been constructed from Montana through Calgary, Alberta, through Whitehorse, Canada by Army engineers to move supplies and equipment, and to build airbases, to service the requirements of the Pacific theater, including transport of Lend Lease aircraft to the Soviet Union after its invasion by Germany.

The road was built in the 1940s through challenging terrain, largely by battalions of Black engineers, including the 97th Engineer Battalion. in order to facilitate transport of World War II material in particular from ports such as Valdez and Anchorage to the interior. It was upgraded in the 1950s to better connect the Richardson Highway more directly with Tok. It was called a "cut-off" because it allowed motor traffic coming to and from Canada on the Alaska Highway, to drive directly northeast or southwest connect to or from Southcentral Alaska communities without driving all the way to or from the terminus of the Alaska highway in Delta Junction, then traveling northwest or southeast by the Richardson Highway, reducing 120 miles (190 km) from the trip.

The 2002 Denali earthquake caused significant damage to the Cut-Off, particularly between mileposts 75 and 83 where major cracks and embankment slumping left the roadway fundamentally destroyed.

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