Mountain pass closure and opening dates

Historic opening and closing dates for Chinook, Cayuse and North Cascades passes

Year	Opened	Closed
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. 25	Oct. 19 - temporary Nov. 21
2018	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
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. 21
2018	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
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

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