So I am doing a race in July called the Crusher in the Tushar. It's 70 miles long with 11,000 ft of elevation gain. It's on a mix of dirt, gravel, and asphalt. I am mulling over tire choices for my cyclocross rig. I am going to do the race tubeless. I currently have Schwalbe Sammy Slicks as my tire, but I don't get enough traction when I encounter gravel and bigger rocks. I am currently looking at Stan's Raven, Clement LAS, and Clement X'Plor USH as options for tires. Any input on which one I should go with? My main worry is the 4,000 foot climb I have to descend and then climb - the road is pretty gnarly - gravel, washboard, and 16% grades. Thanks for your help!