Mountain pass closure and opening dates
Historic opening and closing dates for Chinook, Cayuse and North Cascades passes
- Chinook Pass SR 410
Year
Opened
Closed
2025 May 23 2024 May 31 Oct. 31 2023 May 26 Nov. 10 2022 May 26 Oct. 27 2021 May 28 Nov. 9 2020 June 4 Nov. 12 2019 May 23
reopened -- Oct. 25Oct. 19 - temporary
Nov. 212018 June 11 Nov. 20 2017 June 9 Nov. 7 2016 May 17 Nov. 29 2015 April 2 Nov. 16 2014 May 23 Nov. 24 2013 May 17 Dec. 2 2012 May 25 Nov. 12 2011 June 23 Nov. 11 2010 May 28 Nov. 16 2009 May 22 Nov. 8 2008 June 5 Dec. 15 2007 May 24 Nov. 29 2006 May 25 Nov. 12 2005 Apr. 28 Oct. 25 2004 May 6 Dec. 7 2003 May 14 Nov. 17 2002 May 31 Dec. 10 2001 May 10 Nov. 26 2000 May 18 Nov. 27 1999 Jul. 1 Nov. 30 1998 May 20 Nov. 20 1997 Jun. 12 Nov. 19 1996 May 23 Nov. 16 1995 Jun. 7 Nov. 7 1994 May 27 * Oct. 31 1993 May 28 * Nov. 18 ** 1992 May 8 Nov. 21 1991 May 24 Nov. 19 1990 May 17 Nov. 21 1989 May 26 Nov. 28 1988 May 12 Nov. 10 1987 May 13 Nov. 23 1986 May 22 Nov. 18 1985 May 22 Nov. 9 1984 May 24 Nov. 5 1983 May 25 Nov. 14 1982 Jun. 10 Nov. 16 1981 Apr. 29 Nov. 20 1980 May 21 Nov. 17 1979 May 25 Nov. 24 1978 May 25 Nov. 18 1977 N/A Nov. 15 1976 Jun. 11 None 1975 Jun. 13 Oct. 28 1974 Jul. 12 Dec. 18 1973 Apr. 5 Nov. 9 1972 Jun. 23 Nov. 9 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
- Cayuse Pass SR 123
Year
Opened
Closed
2025 May 23 2024 May 24 Oct. 31 2023 May 26 Nov. 10 2022 May 27 Oct. 25 2021 May 28 Nov 9 2020 June 4 Nov. 12 2019 May 23 - reopened - Oct. 20 Oct. 19 - temporary
Nov. 212018 June 11 Nov. 20 2017 May 19 Nov. 7 2016 April 29 Nov. 29 2015 April 2 Nov. 16 2014 May 16 Nov. 24 2013 May 3 Nov. 20 2012 May 8 Nov. 12 2011 May 26 Nov. 11 2010 April 30 Nov. 16 2009 May 15 Nov. 8 2008 May 23 Dec. 15 2007 Sept. 29 # Nov. 29 2006 Jun. 30 Nov. 12 2005 Apr. 21 Nov. 4 2004 Apr. 30 Dec. 6 2003 Apr. 18 Nov. 18 2002 May 6 Dec. 12 2001 Apr. 20 Nov. 26 2000 Apr. 20 Nov. 28 1999 Jun. 3 Nov. 30 1998 Apr. 25 Nov. 23 1997 May 23 Nov. 20 1996 Jun. 21# Oct. 7## 1995 May 24 Dec. 4 1994 May 23 * Oct. 31 1993 May 28 * Nov. 18 1992 Mar. 30 Nov. 30 1991 May 3 Dec. 7 1990 May 17 Nov. 24 1989 May 1 Jan. 4, 1990 1988 Apr. 15 Nov. 17 1987 Apr. 3 Nov. 30 1986 Apr. 10 Nov. 28 1985 Apr. 19 Nov. 17 1984 Apr. 6 Nov. 16 1983 Apr. 7 Nov. 24 1982 Apr. 30 Dec. 2 1981 Mar. 18 Nov. 30 1980 Apr. 21 Dec. 4 1979 Apr. 23 Jan. 8, 1980 1978 Apr. 3 Dec. 10 1977 N/A Dec. 2 1976 May 14 None 1975 Apr. 29 Nov. 30 1974 May 29 Dec. 30 1973 Not available Dec. 12 * Due to Construction
*** Temporary Closure Date
# Due to Winter Storm Damage
## For Repair of Winter Storm Damage
- North Cascades SR 20
Year
Opened
Closed
2025 April 22 2024 April 19 Nov. 18 2023 May 11 Nov. 30 2022 May 10 Nov. 3 2021 May 5 Nov 15 2020 May 12 Nov. 16 2019 April 18 Dec. 11 2018 May 11 Nov. 28 2017 May 16 Nov. 10 2016 April 22 Nov. 18 2015 April 3 Nov. 12 2014 May 8 Nov. 24 2013 April 16 Dec. 3 2012 May 10 Nov. 20 2011 May 25 Nov. 21 2010 April 16 Dec. 1 2009 April 24 Nov. 17 2008 May 1 Dec. 15 2007 April 26 Dec. 4 2006 May 1 Nov. 13 2005 Mar. 10 Nov. 3 2004 Apr. 8 Dec. 13 2003 Apr. 14 Oct 17 2002 May 7 Dec. 17 2001 Mar. 22 Nov. 19 2000 Mar. 30 Nov. 28 1999 May 5 Dec. 6 1998 Apr. 2 Nov. 20 1997 May 7 Dec. 16 1996 Apr. 24 Nov. 19 1995 Apr. 28 Nov. 5 1994 Apr. 7 Oct. 31 1993 Mar. 24 Dec. 8 1992 Apr. 9 Dec. 8 1991 May 2 Nov. 17 1990 Apr. 18 Nov. 12 1989 Apr. 21 Jan. 3, 1990 1988 Apr. 20 Nov. 19 1987 Apr. 15 Dec. 1 1986 Apr. 11 Nov. 26 1985 Apr. 12 Nov. 15 1984 Apr. 4 Nov. 2 1983 Apr. 20 Nov. 24 1982 May 6 Dec. 2 1981 Apr. 24 Nov. 30 1980 Apr. 18 Nov. 27 1979 Apr. 10 Dec. 15 1978 Apr. 21 Dec. 11 1977 N/A Nov. 23 1976 May 21 None 1975 May 16 Nov. 24 1974 Jun. 14 Nov. 21 1973 Apr. 27 Nov. 21 1972 Sept. 2 Nov. 26 * Due to Construction
*** Temporary Closure Date
# Due to Winter Storm Damage
## For Repair of Winter Storm Damage
Slow down – lives are on the line.
Excessive speed was a top cause of work zone collisions in 2024.
Phone down, eyes up.
Work zones need our undivided attention.
It's in EVERYONE’S best interest.
96% of people hurt in work zones are drivers, their passengers or passing pedestrians, not just our road crews.