I have been remiss in reporting this (sorry). I thought the trail was open based on the # of cars and people I see there every week.
I called Parks & Open Space and they do not have a projected opening date. You can see the falls from the road. It is a very bad idea to crawl over the gate.
Call or check the website if you had planned to hike the short trail: 303-441-3440
From the OSMP website:
Boulder Falls Trail remains closed. The trail was scheduled to open on May 1, 2013, but will remain closed for some time. While OSMP hoped to be able to open the trail on May 1 as usual, due to the unusual number of snow storms and amount of snow received in April this year, the scaling that needs to be done before opening the trail was not possible. This work will be completed as soon as it can be arranged so the trail can be opened.