Geology
Riverside County, CA
Approximate location — plotted from published sources, not a site visit, and not a guarantee of access.
Dark basalt volcanic dome rising above Queen Valley inside Joshua Tree National Park—one of the park’s clearest windows into young Mojave volcanism. Hard black basalt weathers slowly against pale monzogranite, and a short Geology Tour Road spur plus a ~1.6 mi out-and-back scramble put visitors on the hill’s lower slopes with wide views across the park’s basin-and-range landscape.
| Region | Riverside County, CA |
|---|---|
| Coordinates (approx.) | 33.9397, -116.0878 |
| Management | Joshua Tree National Park (NPS) |
| Feature | Basaltic volcanic dome / plug |
| Access | Geology Tour Road (4WD/high-clearance recommended when soft) |
| Nearby | Ryan Mountain, Hexie Mountains, Pinto Basin |
Public recreation data — BLM & Recreation.gov (RIDB). Verify current access, fees, and seasonal closures before traveling.
Map preview
The interactive map and its tiles load only when requested.
Plan ahead. Leave no trace. Verify current access before traveling.