This was one of my favorite stops during our Redwoods road trip, because although the trees are not particularly thick or tall, the ground has the lushest covering of redwood sorrel - it looks straight out of a fairy tale!
Trailhead: Google Maps
Parking: By the side of the highway
The turnout can be hard to spot on the north end of the Avenue of the Giants, as the only sign letting you know is the sign naming the grove, and parking is right along the side of the highway.
Once you park, there isn't much of a designated trail to follow as the grove is more of an area to explore. There are multiple paths forking through the grove, and it isn't long before the ground is covered in the sorrel.