Compare the canyons
The storm morning question is never really about one canyon. It is about which of them is open, posted at a class your vehicle meets, and actually moving. These pages put the answers side by side, live.
Parleys Canyon vs the Cottonwood Canyons
The interstate against the canyons, live. Parleys is a freight interstate with a Class 1 and 2 traction segment; the Cottonwoods are Class 3 canyon roads with mouth enforcement and avalanche exposure. On a storm morning these three verdicts, read together, are the whole decision.
Little Cottonwood vs Big Cottonwood
Canyon against canyon, live. Same bench, same Class 3 traction standard, same enforcement. Different snow, different avalanche exposure, different closure habits. This is the page for the Wasatch Boulevard decision.