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Allison Pass

Allison Pass
At the summit of Allison Pass
Elevation1,342 m (4,403 ft)
Traversed by Highway 3 (Crowsnest Highway)
LocationBritish Columbia, Canada
RangeCanadian Cascades
Coordinates49°7′N 120°52′W / 49.117°N 120.867°W / 49.117; -120.867
Topo mapNTS 92H2 Manning Park
Allison Pass is located in British Columbia
Allison Pass
Location in British Columbia

Allison Pass (el. 1,342 m or 4,403 ft) is a highway summit along the Crowsnest Highway in British Columbia, Canada.[1] It is the highest point on the section of highway between the cities of Hope and Princeton. It is located in the middle of Manning Park, at the divide between the Skagit & Similkameen River drainages (and thus the watersheds of the Salish Sea and the Columbia River), as well as on the boundary between the Fraser Valley and Okanagan-Similkameen Regional Districts, approximately 12 km (7 mi) west of the Manning Resort and 54 km (34 mi) from Hope. The Skagit River originates at the pass while the Similkameen River originates just north of it.

Cyclists and motorists alike find this stretch of road difficult because of the steep grades and high altitudes. On the way from Hope to Allison Pass, one must ascend the 7% (1 in 14) grades up to the Hope Slide before one can start up to Allison Pass, leaving many trucks waiting at the side of the road for their engines to cool down.

History

The pass was named after John Fall Allison, a rancher living in Princeton.[2]

Climate

Climate data for Allison Pass
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °C (°F) 7.8
(46.0)
12.2
(54.0)
16.7
(62.1)
17.2
(63.0)
24.4
(75.9)
31.1
(88.0)
31.7
(89.1)
31.7
(89.1)
27.2
(81.0)
23.3
(73.9)
12.2
(54.0)
8.3
(46.9)
31.7
(89.1)
Mean daily maximum °C (°F) −4.1
(24.6)
−0.9
(30.4)
1.9
(35.4)
6.4
(43.5)
10.5
(50.9)
14.8
(58.6)
19.8
(67.6)
19.2
(66.6)
15.0
(59.0)
8.2
(46.8)
0.3
(32.5)
−2.9
(26.8)
7.4
(45.2)
Daily mean °C (°F) −7.9
(17.8)
−5.4
(22.3)
−3.5
(25.7)
0.8
(33.4)
4.5
(40.1)
8.3
(46.9)
12.1
(53.8)
11.7
(53.1)
8.3
(46.9)
3.0
(37.4)
−3.4
(25.9)
−6.5
(20.3)
1.8
(35.3)
Mean daily minimum °C (°F) −11.7
(10.9)
−9.8
(14.4)
−8.8
(16.2)
−4.7
(23.5)
−1.5
(29.3)
1.6
(34.9)
4.3
(39.7)
4.2
(39.6)
1.5
(34.7)
−2.2
(28.0)
−7.0
(19.4)
−10.0
(14.0)
−3.7
(25.4)
Record low °C (°F) −34.4
(−29.9)
−25.6
(−14.1)
−26.7
(−16.1)
−16.1
(3.0)
−11.7
(10.9)
−5.0
(23.0)
−2.2
(28.0)
−2.2
(28.0)
−6.7
(19.9)
−17.8
(0.0)
−30.0
(−22.0)
−42.8
(−45.0)
−42.8
(−45.0)
Average precipitation mm (inches) 262.9
(10.35)
174.7
(6.88)
143.6
(5.65)
85.5
(3.37)
73.7
(2.90)
74.1
(2.92)
30.2
(1.19)
45.9
(1.81)
64.3
(2.53)
103.1
(4.06)
188.7
(7.43)
277.8
(10.94)
1,524.5
(60.03)
Average snowfall cm (inches) 240.2
(94.6)
163.7
(64.4)
125.0
(49.2)
75.1
(29.6)
24.3
(9.6)
0.3
(0.1)
0.2
(0.1)
0.0
(0.0)
3.3
(1.3)
35.3
(13.9)
146.2
(57.6)
207.9
(81.9)
1,021.5
(402.3)
Average precipitation days 20 17 17 12 13 12 7 9 12 14 19 22 174
Source: Environment and Climate Change Canada[3][4]

References