Tioga Road Opening & Closing Dates

Plow clearing the Tioga Road; snowbanks on both sides of road
Clearing of the Tioga Road normally begins on or about April 15 each year and usually takes between one and two months. Predicting when these roads will open is not possible, even in late spring, because April and May weather significantly affects plowing progress. (April 1 snowpack (water content of the snowpack as a percent of average) for the Tuolumne drainage is listed as a reference.)


View Tioga Road and Glacier Point Road plowing updates (beginning around April 15 each year).

 

Year

Tioga Road

Glacier Point

Mariposa Grove

Snowpack

Opened

Closed

Opened

Closed

Opened

Closed

as of Apr. 1

2019

?

?

May 10

?

Apr 16

?

176%

2018

May 21

Nov 20

Apr 28

Nov 20

Jun 15 ***

Nov 30

67%

2017

June 29

Nov 14

May 11

Nov 14

Closed ***

Closed ***

177%

2016

May 18

Nov 16

Apr 19

Nov 16

Closed ***

Closed ***

89%

2015

May 4

Nov 1

Mar 28

Nov 2

No closure

July 6 ***

7%

2014

May 2

Nov 13

Apr 14

Nov 28

No closure

Never closed

33%

2013

May 11

Nov 18

May 3

Nov 18

No closure

Never closed

52%

2012

May 7

Nov 8

Apr 20

Nov 8

No closure

No closure

43%

2011

Jun 18

Jan 17, 2012

May 27

Nov 19**

Apr 15

No closure

178%

2010

Jun 5

Nov 19

May 29

Nov 7

Mar 26/
May 21

Nov 20

107%

2009

May 19

Nov 12

May 5

Nov 12

92%

2008

May 21

Oct 30

May 2

Dec 12

99%

2007

May 11

Dec 6

May 4

Dec 6

46%

2006

Jun 17

Nov 27

May 25

Nov 27

129%

2005

Jun 24

Nov 25

May 25

?

163%

2004

May 14

Oct 17

May 14

?

83%

2003

May 31

Oct 31

May 31

Oct 31

65%

2002

May 22

Nov 5

May 17

Nov 5

95%

2001

May 12

Nov 11

May 15

?

67%

2000

May 18

Nov 9

May 15

Nov 9

97%

Year

Tioga Road

Glacier Point

Mariposa Grove

Snowpack

Opened

Closed

Opened

Closed

Opened

Closed

as of Apr. 1

1999

May 28

Nov 23*

May 28

Nov 23

110%

1998

Jul 1

Nov 12

Jul 1

Nov 6

156%

1997

Jun 13

Nov 12

May 22

Nov 12

105%

1996

May 31

Nov 5

May 24

Nov 5

111%

1995

Jun 30

Dec 11

Jul 1

Dec 11

178%

1994

May 25

Nov 10

51%

1993

Jun 3

Nov 24

159%

1992

May 15

Nov 10

58%

1991

May 26

Nov 14

79%

1990

May 17

Nov 19

45%

1989

May 12

Nov 24

83%

1988

Apr 29

Nov 14

31%

1987

May 2

Nov 13

51%

1986

May 24

Nov 29

137%

1985

May 8

Nov 12

97%

1984

May 19

Nov 8

85%

1983

Jun 29

Nov 11

224%

1982

May 28

Nov 15

131%

1981

May 15

Nov 12

77%

1980

Jun 6

Dec 2

144%

Average
('96-'15)

May 26

Nov 14

May 14

Nov 15

--

--

92%

Median
('96-'15)

May 21

Nov 12

May 16

Nov 10

--

--

96%

Note: Snowpack shows the percent of average for the Tuolumne River drainage (which includes the higher elevation areas of Tioga Road).

* Re-opened December 23, 1999 - January 1, 2000.

** Re-opened December 16, 2011 - January 17, 2012.

*** Mariposa Grove was closed for a restoration project July 6, 2016–June 15, 2018

Caltrans has a list of recent closing and opening dates for other passes in the Sierra Nevada.

Last updated: May 10, 2019

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