Sight · Big Bend National Park
A roadside geology lesson framed by a steep volcanic peak.
Overview
Map
Plan your stop
The highest, rockiest slopes around here are a summer buffet for grizzly bears.
Big Bend Tour Guide
Parkwolf is a GPS audio tour guide for Big Bend National Park. As you drive, it chimes in with what’s ahead: hidden gems, upcoming stops, history, geology, and wildlife, right through your car’s speakers.
See the Big Bend audio tourRecorded for this place
Cerro Castellan Exhibit“You're nearing Cerro Castellan Exhibit, where a roadside panel helps you read the bands on the steep peak above Castolon. Match its marked picture to the mountain: gravel and clay lie between volcanic layers.”
Plays as you drive up to Cerro Castellan Exhibit in the Parkwolf Big Bend Tour Guide.
More stories near here in the app
“Fantastic app with many points of information… It’s great to just turn on while you’re driving and it gives you an audio tour of the national Park. We love it!!!!”
Guide
Cerro Castellan Exhibit is a roadside geology stop and viewpoint on Ross Maxwell Scenic Drive, facing the steep, layered peak above Castolon. Stop for the interpretation of the mountain's volcanic layers and the view; this is the exhibit stop, not a route to the summit. It works well as a short pause on the scenic drive, especially if you like understanding the rocks behind the landscape.
The panel's marked image helps connect the actual peak to the bands on its slope. Cerro Castellan is built from lava flows and volcanic tuff, or hardened ash, with gravel and clay deposited between eruptions. Erosion leaves this resistant pile standing above the surrounding rock, giving the mountain its steep, conical profile.
The caprock is the same lava that forms the Chisos Mountains' South Rim. Ash layers at nearby Tuff Canyon are older than the stack here, a useful comparison if you are driving the same scenic road. Lower on Cerro Castellan, sparse desert scrub includes creosote and ocotillo; little vegetation grows on its sheer upper cliffs.
The exhibit is 20.4 miles from the north end of Ross Maxwell Scenic Drive, beside parking for autos and buses or RVs. The National Park Service lists the exhibit as wheelchair accessible. Read the panel, then look up and match its marked layers to the real peak. For a photo, include the interpretive pedestal in the foreground with Cerro Castellan behind it, as the two together identify this particular roadside stop.
Wildlife
377 sightingsBlack BearMost seen around 7 PMSighting map
329 sightingsCollared PeccaryMost seen around 7 PMSighting map
500 sightingsWhite-tailed DeerMost seen around 7 PMSighting map
985 sightingsRoadrunnerMost seen around 8 AMSighting map
228 sightingsRavenMost seen around 5 PMSighting map
264 sightingsTurkey VultureMost seen around noonSighting mapSighting maps show where each species has been reported across Big Bend. Wildlife moves, so no sighting is guaranteed.
Keep exploring
EasyTuff Canyon Trail0.5 mi · 20 min · 1 mi awayA short rim walk with a clear look at volcanic layers.
ModerateMule Ears Spring Trail3.8 mi · 2 hr · 4.3 mi awayA rock corral and spring tucked into a desert walk
EasyDorgan Sublett Trail1 mi · 30 min · 4.6 mi awayA quick farmstead walk with a big hilltop view.
Sight · 1 mi awayTuff CanyonThree rim platforms reveal pale tuff and a deep, narrow canyon.
Sight · 1.2 mi awayCastolon Historic DistrictA borderland history stop among Big Bend’s adobe buildings.
Visitor center · 1.2 mi awayCastolon Visitor CenterHistoric adobe, ranger advice, and a wide view over the Rio Grande.
Store · 1.2 mi awayLa Harmonita StoreCold drinks and practical supplies along the remote west side.
Campground · 1.4 mi awayCottonwood CampgroundA quiet, dry-camping base near Santa Elena Canyon.
Sight · 2.1 mi awayLa CoyotaRuins of a farming community that sold food to miners.
Scenic pullout · 2.1 mi awayDesert Mountain OverlookFind Emory Peak, the South Rim and Elephant Tusk from the road.
Sight · 4.3 mi awayMule Ears OverlookPaired volcanic spires make this roadside detour worth a stop.Parkwolf’s Big Bend ranking
The audio tour guide for the drive, plus offline maps, trails, and wildlife heatmaps for when the signal drops.
