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Mountain Pass Closure and Opening Dates

 Chinook Pass
SR 410
Cayuse Pass
SR 123
North Cascades
SR 20
Year Opened Closed Opened Closed Opened Closed
2014 May 23 May 3 May 8
2013 May 17 Dec. 2 May 3 Nov. 20 April 16 Dec. 3
2012 May 25 Nov. 12 May 8 Nov. 12 May 10 Nov. 20
2011 June 23 Nov. 11 May 26 Nov. 11 May 25 Nov. 21
2010 May 28 Nov. 16 April 30 Nov. 16 April 16 Dec. 1
2009 May 22 Nov. 8 May 15 Nov. 8 April 24 Nov. 17
2008 June 5 Dec. 15 May 23 Dec. 15 May 1 Dec. 15
2007 May 24 Nov. 29 Sept. 29 # Nov. 29 April 26 Dec. 4
2006 May 25 Nov. 12 Jun. 30 Nov. 12 May 1 Nov. 13
2005 Apr. 28 Oct. 25 Apr. 21 Nov. 4 Mar. 10 Nov. 3
2004 May 6 Dec. 7 Apr. 30 Dec. 6 Apr. 8 Dec. 13
2003 May 14 Nov. 17 Apr. 18 Nov. 18 Apr. 14 Oct 17
2002 May 31 Dec. 10 May 6 Dec. 12 May 7 Dec. 17
2001 May 10 Nov. 26 Apr. 20 Nov. 26 Mar. 22 Nov. 19
2000 May 18 Nov. 27 Apr. 20 Nov. 28 Mar. 30 Nov. 28
1999 Jul. 1 Nov. 30 Jun. 3 Nov. 30 May 5 Dec. 6
1998 May 20 Nov. 20 Apr. 25 Nov. 23 Apr. 2 Nov. 20
1997 Jun. 12 Nov. 19 May 23 Nov. 20 May 7 Dec. 16
1996 May 23 Nov. 16 Jun. 21 # Oct. 7 ## Apr. 24 Nov. 19
1995 Jun. 7 Nov. 7 May 24 Dec. 4 Apr. 28 Nov. 5
1994 May 27 * Oct. 31 May 23 * Oct. 31 Apr. 7 Oct. 31
1993 May 28 * Nov. 18 ** May 28 * Nov. 18 Mar. 24 Dec. 8
1992 May 8 Nov. 21 Mar. 30 Nov. 30 Apr. 9 Dec. 8
1991 May 24 Nov. 19 May 3 Dec. 7 May 2 Nov. 17
1990 May 17 Nov. 21 May 17 Nov. 24 Apr. 18 Nov. 12
1989 May 26 Nov. 28 May 1 Jan. 4, 1990 Apr. 21 Jan. 3, 1990
1988 May 12 Nov. 10 Apr. 15 Nov. 17 Apr. 20 Nov. 19
1987 May 13 Nov. 23 Apr. 3 Nov. 30 Apr. 15 Dec. 1
1986 May 22 Nov. 18 Apr. 10 Nov. 28 Apr. 11 Nov. 26
1985 May 22 Nov. 9 Apr. 19 Nov. 17 Apr. 12 Nov. 15
1984 May 24 Nov. 5 Apr. 6 Nov. 16 Apr. 4 Nov. 2
1983 May 25 Nov. 14 Apr. 7 Nov. 24 Apr. 20 Nov. 24
1982 Jun. 10 Nov. 16 Apr. 30 Dec. 2 May 6 Dec. 2
1981 Apr. 29 Nov. 20 Mar. 18 Nov. 30 Apr. 24 Nov. 30
1980 May 21 Nov. 17 Apr. 21 Dec. 4 Apr. 18 Nov. 27
1979 May 25 Nov. 24 Apr. 23 Jan. 8, 1980 Apr. 10 Dec. 15
1978 May 25 Nov. 18 Apr. 3 Dec. 10 Apr. 21 Dec. 11
1977 N/A Nov. 15 N/A Dec. 2 N/A Nov. 23
1976 Jun. 11 None May 14 None May 21 None
1975 Jun. 13 Oct. 28 Apr. 29 Nov. 30 May 16 Nov. 24
1974 Jul. 12 Dec. 18 May 29 Dec. 30 Jun. 14 Nov. 21
1973 Apr. 5 Nov. 9   Dec. 12 Apr. 27 Nov. 21
1972 Jun. 23 Nov. 9     Sept. 2 Nov. 26
1971 Jun. 18 Nov. 1        
1970 May 29 Nov. 11        
1969 May 27 Dec. 10        
1968 May 10 Nov. 22        
1967 Jun. 3 Nov. 28        
1966 May 26 Nov. 16        
1965 May 28 Nov. 24        
1964 Jun. 20 Nov. 22        
1963 May 28 Nov. 7        
1962 May 20 Nov. 25        
1961 Jun. 6 Nov. 11        
1960 May 25 Nov. 15        
1959 May 22 Nov. 19        
1958 May 24 Nov. 9        
1957 May 10 Nov. 27        
1956 Jun. 13 Nov. 16        
1955 Jun. 6 Nov. 17        
1954 Jun. 19 Dec. 5        
1953 May 30 Nov. 21        
1952 May 16 Dec. 4        
1951 May 19 Nov. 11        
1950 Jun. 7 Nov. 15        
1949 May 27 Dec. 9        
1948 Jun. 12 Nov. 3        
1947 May 15 Nov. 5        
1946 Jun. 27 Nov. 1        
1945 Jun. 2 Nov. 9        
1944 May 20 Nov. 23        
1943 Jun. 18 Nov. 4        
1942 May 3 Nov. 3        
1941 Apr. 15 Dec. 15        
1940 May 15 Nov. 8        
1939 May 7 Dec. 15        
1938 May 28 Nov. 16        
1937 Jun. 1 Nov. 12        
1936 May 23 Dec. 8        
1935 May 21 Nov. 15        
* Due to Construction
** SR 410 North of Chinook Pass Closed 11/1/93 Due to Construction
*** Temporary Closure Date
# Due to Winter Storm Damage
## For Repair of Winter Storm Damage