I was just on the Summit Explorer Hiking web page. There is a message on the Mcullough Gulch page urging hikers not to take this hike M-F. The site said that there is construction going on and hikers may face delays of 30 min. As best as I could understand, this is only M-F but if you are here like me, you might want to check for weekends. Not sure who you would check with.