Update 9/27/12: FR 25 is now open.
Update 9/4/12: The FR 25 construction and the closure have been pushed back into late September, for more information, see this updated news release.
Even though it just recently opened, FR 25, the 'back way' to Mt St Helens which also provides access to Windy Ridge will close for 10 days in September. The closure will occur at the north end near Randall so you will still be able to access Windy Ridge and other spots, you will just have to do it from the south.
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From the news release: