BAC001
Location: 44.726118, -110.702094
Norris Geyser Basin Trailhead: Follow the path to the Norris Geyser Basin Museum and heed the warnings to stay on the boardwalk.
BAC002
Location: 44.726343, -110.703623
At the Norris Geyser Basin Museum, take the left-most path downhill, then veer left at the next junction in 30 feet.
BAC003
Location: 44.723427, -110.703489
Cross your fingers as you walk by Steamboat Geyser, the tallest active geyser in the world. This geyser is entirely unpredictable in its eruption pattern, but if you're lucky enough to catch the spectacular show, you'll see steaming, mineral-rich water shoot up to 300 feet in the air.
BAC004
Location: 44.722989, -110.703529
Side trip: Visit Cistern Spring before turning left at this T-junction. The pool for Cistern Spring drains after Steamboat Geyser erupts, illustrating the linked underground channels between these two thermal features. This spring commonly overflows creating one of the fastest developing areas in the park. The silica-rich water deposits as much as a ½ inch of sinter each year (most thermal features in the park grow at a rate of ½ to 1 inch per century.
BAC005
Location: 44.722142, -110.702276
Once a major attraction and show of force, Echinus Geyser's past eruptions lasted up to 118 minutes. Though now highly erratic, this extremely rare acid geyser still remains the largest known acid-water geyser.
BAC006
Location: 44.721716, -110.703762
Arch Steam Vent
BAC007
Location: 44.719974, -110.706482
Black Hermit Caldron
BAC008
Location: 44.720664, -110.707131
Blue Mud Steam Vent
BAC009
Location: 44.721007, -110.707142
Yellow Funnel Spring: This crater-shaped spring stays at a perpetual rolling boil. Ahead: Stop at the panoramic view of the basin stretching out before you.
BAC010
Location: 44.721761, -110.708499
Pass a milky blue pond. Sinter mixes with the pond's now cool waters to create the sky blue color. Plants still thrive in these waters, which also preserve the dead roots of trees that have toppled over.
BAC011
Location: 44.722236, -110.707667
Porkchop Geyser: This ever-changing spring exploded on September 5, 1989 sending rock and mineral deposits flying to their present place.
BAC012
Location: 44.722291, -110.707405
Pearl Geyser
BAC013
Location: 44.722852, -110.707056
Vixen Geyser
BAC014
Location: 44.723393, -110.706434
Continue straight at 3-way and begin the climb back to the museum. Leave the heart of the basin and enter a forested area where geysers steam left and right.
BAC015
Location: 44.723934, -110.706208
Palpitator Spring
BAC016
Location: 44.724056, -110.706144
Fearless Geyser
BAC017
Location: 44.724426, -110.705709
Monarch Geyser
BAC018
Location: 44.725073, -110.705988
Minute Geyser
BAC019
Location: 44.726926, -110.703623
Look out onto Porcelain Basin to the north before turning right at this 4-way junction and heading south to the Norris Geyser Basin Museum. Stop to check out the museum's exhibits, which explain the origins of the features found here. Ahead, the route reconnects with Waypoint 2; turn left to return to the trailhead.
Steamboat Geyser
Location: 44.723442, -110.703454
Steamboat Geyser
Location: 44.723421, -110.703443
Steamboat Geyser
Location: 44.723389, -110.70344
Interpretive Sign
Location: 44.722983, -110.703489
Echinus Geyser
Location: 44.722163, -110.702247
Echinus Geyser
Location: 44.722131, -110.702241
Crater Spring
Location: 44.721982, -110.70321
Crater Spring
Location: 44.72199, -110.703258
Mystic Spring
Location: 44.721281, -110.705962
Puff 'N Stuff Geyser
Location: 44.720054, -110.706155
Black Hermit Caldron
Location: 44.71997, -110.706434
Green Dragon Spring
Location: 44.720176, -110.707024
Green Dragon Spring
Location: 44.720183, -110.707072
Yellow Funnel Spring
Location: 44.72101, -110.707072
A Milky Blue Pool
Location: 44.721765, -110.708451
Pearl Geyser
Location: 44.722291, -110.707346
Close-Up
Location: 44.722435, -110.707272
This 1.7-mile lasso loop in Norris Geyser Basin visits the ever-changing thermal features of Back Basin. Boasting the hottest thermal landscape in Yellowstone National Park, Norris Geyser Basin is a memorable stop on your park tour. From the parking area, head west to the Norris Geyser Basin Museum. At the museum, take the left-most path downhill, then veer left at the next junction to enter the stark expanses of Back Basin.
After 0.3 mile, the route passes Steamboat Geyser, the tallest active geyser in the world. If you're lucky enough to catch the spectacular show, you'll see steaming, mineral-rich water shoot up to 300 feet in the air. Roughly 200 feet later, make a stop at Cistern Spring, a pool linked to Steamboat Geyser through underground channels. At mile 0.4, the path passes, the largest known acid-water geyser: Echinus Geyser. Once a major attraction and show of force, Echinus' past eruptions lasted up to 118 minutes.
From here, the route cruises past Arch Steam Vent, Black Hermit Caldron, Blue Mud Steam Vent, Yellow Funnel Spring, and Porkchop Geyser. At mile 1.1, continue straight at the 3-way and begin the climb back to the museum. Leave the heart of the basin and enter a forested area where geysers steam left and right. Four geysers—and 0.4 mile later—turn right at a 4-way junction and head south to reconnect with Norris Geyser Basin Museum. Stop to check out the museum's exhibits before to returning to the trailhead.
MORE PARK INFO: Yellowstone National Park, (307) 344-7381; nps.gov/yell/.
-Mapped by Jeff Chow