overlook · high value
Grand Prismatic Overlook
The elevated view reveals the spring's full shape, but the spur starts at 14% and reaches 19% grades.
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
Overlook trail is open but very steep
NPS documents a 14% initial running slope, grades up to 19%, and cross slopes up to 10%. The boardwalk is the knee-friendly alternative.
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
Color from above, steeply earned
Narration
Color from above, steeply earned
What to notice
- Full aerial view of Grand Prismatic
- Excelsior crater
- Documented 14–19% grades
Field notes
- Trail grade
- 14% at the beginning; up to 19%, with cross slopes up to 10%
- Current trail status
- Open to the overlook; trail closed beyond the overlook during the cited 2026 update