The naming of the cave comes from a story of two men who were caught in a bad storm. Upon hiking, these two guys were able to find the cave. One of them commented to the other, "This cave could hold about 40 horses." Another legend tells of a theif that hid 40 horses in the cave to avoid capture. Either way, there's no doubt that 40 horses would fit in the cave.

The hike up to the cave is steep. Elevation gain may only be about 100 feet but even the longest trail is still just under 500 feet (0.1 mile) to the cave. Once you find the trailhead, it's really easy to find. You'll just hike uphill until you come to a large opening in the mountain. The shorter trail has a lot more shale and is a pretty difficult scramble. The longer trail is still steep and difficult but there is much less shale.

Flashlights aren't required, as the cave is only about 50 feet deep. There are a few corners of the cave that are a little more fun to explore with a flashlight.

At the bottom of the trail is a culvert and when the water is higher, it's a fun place to splash around after the hike. You'll see a trail in the willows on the SouthEast side of the road near the culvert. If you follow that trail only about 100 feet of easy hiking, you'll find a smaller cave.