I would just show up, I would think chances would be good that there will be someone else there. I was wondering the same thing on the bike path, cotrip has this posted:
I-70 Eastbound / Westbound Glenwood Canyon BIKE PATH and Hanging Lake trail (Milemarker 123-125)
Glenwood Canyon bike path is closed from the Shoshone power plant to the East Trail due to high water. No bicycles allowed on I-70/shoulders.Hanging Lake Rest Area and the The Hanging Lake parking lot and hiking trail are closed until August 1 for Trail restoration. Road closure began May 29th, 2010 at 3:15pm.
But I do not know where the east trail is but at 10 grand I bet the path is covered.