thermal · high value
Mud Volcano
Acid, clay, steam, and a resonant cave make this Yellowstone's most theatrical short thermal stop.
Yellowstone fire danger is HIGH
The dedicated NPS fire page and July 14 release list HIGH fire danger. No fire restrictions were in place when checked; both danger and restrictions can change.
Checked Jul 26, 2026
Recent bison injury near Mud Volcano
A 12-year-old visitor was injured by a bison here on June 26, 2026. Wait or retreat if wildlife occupies a boardwalk or parking route.
Checked Jul 26, 2026
Parkwide chip sealing can move without notice
NPS says chip sealing can cause delays up to 30 minutes at various Yellowstone locations in 2026. Slow down on loose gravel and increase following distance.
Checked Jul 26, 2026
Chapter
The basin that growls back
Narration
The basin that growls back
What to notice
- Dragon's Mouth Spring
- Churning mudpots
- Sulfur chemistry
Field notes
- Full trail
- 0.6-mile loop
- Accessible option
- Lower loop meets federal wheelchair guidelines; platform stairs remain