Once on the trail proper, the first 2 miles are a more-or-less relentless, steep uphill grind. The third mile levels out somewhat (although it's still uphill) as it follows a ridge toward an intersection with paved road 2102. Here the trail continues to the right another .4 miles through several tight switchbacks to the pinnacle of Larison Rock with its fun, but unimpressive views of the surrounding hills.
The ride back down scarcely requires any pedaling at all. The trail is mostly free of roots and rocks, and has very few natural obstructions to speed so you're free to go as fast as you can stomach.
Given the steepness of this trail, all but the very fittest will be pushing their bikes up at least part of it, and all but the craziest will be riding their brakes on the way back down.
Many ride this trail as a one-way shuttle ride from town, and many others opt to follow gravel road 5852 about a mile to the left to where it meets with road 21. Turn right here and follow this paved road a short distance to the beginning of road 2102 on the right. Follow 2102 about 4.5 miles to the upper Larison Rock trail head.