May 21, 2017 - 5:29 PM
in reply to swissh
No, it typically doesn't open until at least June 15. I've seen it still be closed until early July.
How difficult? Depends on your experience with alpine hiking with lots of elevation gain. The hike ascends about 3200 feet/980 meters over a span of about 10 miles/16 km. The signposted time is 6 hours 10 mins for experienced hikers, not including any breaks.
So, if you are not accustomed to strenuous hikes at high altitude this is definitely not the hike for you! If you are, it is gorgeous but should only be done on a relatively clear day.