Rivian says its Gen 2 Quad has more than 1,000 horsepower and 1,198 pound-feet of torque. That made scaling up a rocky mound in Lake Tahoe a breeze.

The word “off-road” gets thrown around quite a lot these days, with all types of vehicles claiming to have what it takes for the toughest adventures. But rock crawling is where the real bad boys get ...