Grand Prismatic Spring from above
— — a colour wheel laid down in steam.
Not only on a wall.
“The hottest water sits in the middle and runs almost cobalt because nothing can live there. Around the rim the temperature drops a few degrees at a time and different mats of thermophilic bacteria take over — yellow, then orange, then a rust the colour of an old penny. From the boardwalk you stand inside the steam and see one band at a time. From the overlook trail above Fairy Falls you finally see the whole disc at once, three hundred and seventy feet across, sitting in its own breath. — from the studio
Grand Prismatic Spring from above, on ceramic.
Each tile is finished by hand in our Knoxville studio. Artwork is slowly infused into the ceramic surface under high heat and pressure, and rests beneath a thin glossy finish. The colour lives in the surface, not on top of it.
Pick any four 4-inch tiles — National Parks you've been to, a Smokies set, the four seasons of one place. $ for a set of , cork-backed, ready to live on the table.
The place, in three passes.
Grand Prismatic Spring is the largest hot spring in the United States and the third largest in the world, roughly 370 feet across and about 160 feet deep. It sits in the Midway Geyser Basin of Yellowstone National Park, along the Firehole River between Old Faithful and Madison Junction. The boardwalk crosses the runoff at ground level. The overhead view, where the rings of colour read as a single disc, is reached from the Grand Prismatic Overlook, a 1.2-mile spur off the Fairy Falls Trail south of the spring. The spring discharges roughly 560 gallons per minute.
The blue centre is physics: water near 189°F is too hot for most life, and pure deep water scatters blue. The rings around it are biology. As the runoff cools across the sinter terraces, different mats of thermophilic bacteria and archaea take over at each temperature band — Synechococcus producing yellow, Chloroflexus the orange, and the cooler outer mats running rust to brown. The same organisms colour the runoff streams that braid out toward the Firehole River. In winter the colours are muted under heavier steam; in late summer the rings are sharpest.
Two ways to see Grand Prismatic. The boardwalk through Midway Geyser Basin puts you alongside the spring at ground level; on a cold morning the steam can hide the colour completely. The Grand Prismatic Overlook, accessed from the Fairy Falls trailhead about a mile south on Grand Loop Road, is a roughly 1.6-mile round-trip walk with about 100 feet of climb and is the only legal vantage for the full overhead view. The 7-day Yellowstone vehicle pass runs $35 as of the 2026 season. Best light is mid-morning, when the steam has thinned and the sun is high enough to bring the orange forward.