This is a well established national park at a high elevation. There are cabins for rent or you can pay to park in a large designated camping area. $56pesos per person per day. On site is a national observatory, ropes course, mountain bike trails, museum and an overlook. The road is an exit off highway 1 that winds up through the mountains. It is VERY steep grade in some areas and sharp turns that might challenge a long rig. No services so plan for needs and cold weather.
Visited: November 26th, 2014
Location: 31.00348, -115.55552