Atigun Pass

Atigun Pass (/ˈætɪɡən/ AT-i-gən^[1]), elevation 4,739 feet (1,444 m), is a high mountain pass across the Brooks Range in Alaska, located at the head of the Dietrich River.^[2][3] It is where the Dalton Highway crosses the Continental Divide (at mile marker 244), and is the highest pass in Alaska that is maintained throughout the year.^[2][4] Atigun is the only pass in the Brooks Range that is crossed by a road.^{[citation needed]} The pass has been responsible for taking many drivers off the road and is also home to avalanches during the winter.

Atigun Pass
Composite 240-degree view of Atigun Pass
Elevation	approx. 4700 ft. (1,444 m)
Traversed by	Dalton Highway
Location	North Slope Borough, Alaska, United States
Range	Brooks Range
Coordinates	68°07′46″N 149°28′33″W

Atigun Pass, Dalton Highway

Atigun is known among bush pilots for the difficulty of crossing the pass with small planes; Anaktuvuk Pass is favored as the safer flying route.^{[citation needed]}

The pass is often shown on the third and fourth seasons of the History Channel reality series Ice Road Truckers, which focuses on the challenges of driving on the Dalton Highway.

Climate

Atigun Pass, facing north.

Although the latitude of Atigun Pass is very high, the climate type of the place is still close to the alpine climate (Köppen: ETH). In addition, the precipitation in this place is about 5 times that of places such as Utqiagvik and Umiat.

Climate data for Atigun Pass (2006–2020 normals, extremes 2006–present)
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Record high °F (°C)	42 (6)	35 (2)	35 (2)	47 (8)	62 (17)	67 (19)	69 (21)	64 (18)	52 (11)	44 (7)	42 (6)	42 (6)	69 (21)
Mean maximum °F (°C)	25.6 (−3.6)	27.3 (−2.6)	24.5 (−4.2)	36.1 (2.3)	54.6 (12.6)	60.9 (16.1)	63.3 (17.4)	55.5 (13.1)	44.9 (7.2)	32.1 (0.1)	24.4 (−4.2)	25.0 (−3.9)	64.4 (18.0)
Mean daily maximum °F (°C)	2.1 (−16.6)	5.7 (−14.6)	7.5 (−13.6)	20.4 (−6.4)	37.5 (3.1)	49.2 (9.6)	51.4 (10.8)	44.2 (6.8)	33.6 (0.9)	18.9 (−7.3)	7.7 (−13.5)	5.6 (−14.7)	23.7 (−4.6)
Daily mean °F (°C)	−4.3 (−20.2)	−0.9 (−18.3)	0.6 (−17.4)	13.8 (−10.1)	31.0 (−0.6)	43.3 (6.3)	46.4 (8.0)	39.8 (4.3)	28.5 (−1.9)	14.8 (−9.6)	2.2 (−16.6)	−0.8 (−18.2)	17.9 (−7.9)
Mean daily minimum °F (°C)	−10.6 (−23.7)	−7.5 (−21.9)	−6.3 (−21.3)	7.3 (−13.7)	24.6 (−4.1)	37.3 (2.9)	41.5 (5.3)	35.3 (1.8)	24.4 (−4.2)	10.7 (−11.8)	−3.3 (−19.6)	−7.1 (−21.7)	12.2 (−11.0)
Mean minimum °F (°C)	−36.7 (−38.2)	−33.4 (−36.3)	−27.9 (−33.3)	−13.7 (−25.4)	3.1 (−16.1)	25.0 (−3.9)	31.6 (−0.2)	23.4 (−4.8)	11.4 (−11.4)	−6.1 (−21.2)	−22.2 (−30.1)	−28.7 (−33.7)	−40.4 (−40.2)
Record low °F (°C)	−46 (−43)	−44 (−42)	−47 (−44)	−44 (−42)	−16 (−27)	16 (−9)	23 (−5)	14 (−10)	0 (−18)	−14 (−26)	−40 (−40)	−42 (−41)	−47 (−44)
Average precipitation inches (mm)	0.79 (20)	0.94 (24)	0.70 (18)	0.98 (25)	1.55 (39)	2.95 (75)	4.20 (107)	4.35 (110)	2.69 (68)	1.30 (33)	0.82 (21)	0.82 (21)	22.09 (561)
Average precipitation days (≥ 0.01 inch)	4.7	6.0	5.6	7.1	8.5	12.6	15.0	15.5	13.4	9.6	6.2	5.2	109.4
Source 1: NOAA[5]
Source 2: XMACIS2 (mean maxima/minima 2006–2020)[6]