This is not a route to reach the top, but rather a worthwhile side trip that gives you much clearer views into Honduras and the North than you can get from the forested summit. La Piedra Rajada can be translated as "The Cloven Rock", and that's what it is. It's a huge rock formation cloven off of the bulk of the mountain so that there is about a 50 foot drop that must be crossed to reach it. This makes it much more interesting than an ascent of the actual summit.
From that open green area just below the summit, which is the camping area, there is a trail that you can find leading through the bushes on the west side about halfway through the meadow. Ask someone for directions if necessary. If you find this trail, follow it through dense forest and you will pass a couple of signs. One reads, "No Talar Árboles", and the other, which is right at the log bridges, reads "El Bosque Es Vida". If you see these you're on the right track.
Once you reach the abyss, you must cross one of two logs that span the gap. Both have some cables to give you some sense of safety. In my opinion, as you're looking at the abyss, the bridge on the left is the easier one to cross, but try both and see what you think! Once you've made it across, all you have to do is bushwhack to the far side of the monolith and enjoy the expansive views into the next country.
If you're there during the rainy season, roughly June through September, you will most likely want to bring rain gear. Also fresh water, although you may be able to buy some from that shack in the camping area. Try some of the local fruit while you're at it.