There is no public transportation within the park; the car is by far the most common option for area travelers and it's a good way to negotiate the vast expanses. The signage throughout the park is excellent and the paved roads are well-maintained.
There are two main roads in the park: TX-118, which travels from the park's west entrance near Maverick Junction eastbound 23 mi 37 km until it meets the other main road, US-385 at Panther Junction, where there is a gas station and park headquarters. From here TX-118 continues southeast, ending after 20 mi 32 km at Rio Grande Village, where gas can also be purchased. Back at the junction, US-385 begins here and heads northwards for 26 mi 42 km to the north entrance, near Persimmon Gap. These two roads form the shortest route through the park.
By car
The park speed limit is 45 mph 72 kph. Drivers will encounter not only steep grades and blind curves, but also share the road with the occasional bicyclist or wildlife deer and javelina, in particular, lurk on or near the road starting at dusk — so be sure to follow the speed limit. Surprisingly, the number one cause of fatalities in the park is drunk drivers — don't become one yourself and add to the statistic. The park's network of unpaved backroads contain some routes suitable for any car, but some require a high-clearance or 4WD vehicle to drive safely. All vehicles must be street-legal and all-terrain vehicles ATVs are not allowed in the park.
By bike
For traveling the park at a more relaxed pace, totally immersed in your surroundings, nothing beats a bike. No mountain biking is permitted but you have free access to all park roads, both paved and unpaved. Good options for novices are the Ross Maxwell Scenic Drive and the road from Panther Junction to Rio Grande Village; both of which are downhill — make sure to have a shuttle waiting at the other end unless you're prepared for the strenuous trip back up. The backroads offer the real adventure — the Old Ore Road is a good choice for more experienced bikers. Biking is not common in the park yet, so most drivers will not be expecting you; be cautious on curves and after dark. Be sure to check your tires and bring a repair-kit, a good level of fitness, and plenty of water. Desert Sports offers bike rentals, tours, and shuttle services.
On foot
Aside from hiking trails, traveling the park by foot as your primary mode of transportation should only be attempted by those who are extremely well-prepared and fit.
By Horse
Although there are currently no outfitters that rent them, you can bring your own horse yes, B.Y.O.H. — but also make sure to get a required backcountry permit and to be prepared. Horses are restricted to the backcountry, which means paved roads, developed campsites and trails, and much of the Chisos Mountains are all off-limits. Grazing is not permitted, so food has to brought in. A good camping spot is at Government Springs Hannold Draw, which has a corral large enough to accommodate 8 horses and lies about 5 mi 8 km north of Panther Junction.