thermal · high value
Grand Prismatic Boardwalk
The Midway boardwalk puts steam, runoff, and microbial color at eye level on an accessible route.
Biscuit Basin closed until further notice
The closure related to the July 2024 hydrothermal explosion remains in place because hydrothermal activity is unpredictable. Pass the area; do not seek an alternate entrance.
Checked Jul 26, 2026
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
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
At the edge of the largest colors
Narration
At the edge of the largest colors
What to notice
- Grand Prismatic Spring edge
- Excelsior Geyser Crater
- Firehole River
Field notes
- Accessibility
- Accessible parking, boardwalk, and vault toilets
- Excelsior history
- Late-1800s eruptions exceeded 300 feet; now considered dormant