Alex, very closed. You can ride around it on the freeway (which I've seen people do but would never do myself) or ride through the construction (which I've seen people do but would not do myself; it is dirt--not paved--and loaded with nails and whatnot) or drive to the exit on 80 on the other side of the construction (can't remember the number, it's where the visitor center for used to be...it's well west of the international center) and park there and ride to the marnia for a shorter ride. Or ride somewhere else. I've been opting to ride somewhere else. Wasatch should be nice & quiet tomorrow...that's always a nice ride if you're looking for something a little flatter.