Old Faithful facts include ~90-minute intervals, 100–180-foot heights, and a name given in 1870 by the Washburn expedition.
Old Faithful sits in Yellowstone’s Upper Geyser Basin and keeps drawing crowds for a reason: timing you can bank on, a tall water column, and a front-row setup that’s easy to reach. Below are twenty crisp facts that give you stats, history, safety tips, and smart viewing moves, all in one place.
Twenty Old Faithful Facts With Context
1) The Interval Pattern Most Visitors Quote
The average wait between eruptions hovers near an hour and a half. Shorter and longer gaps happen, but the typical range sits from about fifty minutes to just past two hours. Rangers post a time window rather than a single minute, and that window lands close more often than not.
2) Duration Drives The Next Prediction
A quick burst today usually means a shorter wait next time; a long display points to a longer pause. That simple “length leads interval” link powers the classic ranger formula used for public predictions.
3) How Long The Show Lasts
Most displays run from a minute and a half to about five minutes. On the short end you’ll see a tight spike of water. On the long end the column pulses, settles, and then gives you a final flourish of steam.
4) Typical Height You’ll See
The column commonly rises past the treetops. A routine burst clears a hundred feet; stronger ones top out near 180 feet. Wind will shear the spray, so stand cross-wind for clean photos.
5) How Much Water Blasts Out
Short eruptions move a few thousand gallons; long ones push more than twice that. The plumbing below meters the output like a natural valve, with deeper water refilling the system between blasts.
6) Heat Numbers That Make You Respect The Rail
At the vent, the water sits near the local boiling point. Down the throat and deeper in the system, readings climb far past what a pot on your stove could reach. That’s why the boardwalk exists and why rangers stress staying put on it.
7) The Basin Is A Geyser Capital
Within roughly a square mile, the basin hosts an outsized cluster of geysers and hot springs. Only a handful of the big ones get posted prediction times each day, and the names you’ll hear again and again are Castle, Grand, Daisy, Riverside, and the star here.
8) Why Timing Works Here Better Than Elsewhere
The feature’s plumbing appears decoupled from nearby vents, so pressure and heat cycles reset with less interference. That separation produces a pattern sturdy enough for a public board of times that visitors can plan around.
9) The Name Dates To 1870
Members of the Washburn–Langford–Doane party named the geyser for its dependable schedule during their late-summer trek. That label stuck, and the entire Old Faithful Historic District now carries the legacy.
10) Best Spots To Watch Without The Elbow Jostle
The main boardwalk fills first, then the benches nearest the cone. If you want a wider view, the short walk to Observation Point gives a clean angle over the basin when conditions allow. Arrive a bit early for posted windows during peak hours.
11) The Inn Beside The Cone Is A Landmark
Old Faithful Inn opened in the early 1900s. Built with local logs and stone, it’s widely cited as one of the largest log structures in the world and a classic of “parkitecture.” The lobby alone is worth a peek between eruptions.
12) A Webcam Lets You Scout From Anywhere
Can’t be there today? A live stream points at the cone and the Upper Geyser Basin. It’s handy for checking weather, crowds, and the next posted window from your phone.
13) Wind, Temperature, And Crowd Flow Matter
Cold mornings can load extra steam into the plume, making the column look taller yet harder to photograph. Wind pushes spray sideways and can soak folks downwind. Crowds spike mid-day; mornings and late afternoons often feel calmer.
14) What Not To Do—And Why
Leaving the boardwalk in thermal areas causes injuries every year. Beneath the crust sits near-boiling water. The safe play is simple: stay on marked paths, keep kids close, and give wildlife space.
15) Elevation, Air, And Your Camera
The basin sits well above 7,000 feet. Bring water, sunscreen, and a spare battery. Cooler air means more steam; polarizing filters help cut glare, and a fast shutter freezes the spray for crisp frames.
16) The Cone’s Style: A Classic “Cone Geyser”
Over years of splash and mineral build-up, the vent grew a sinter cone. That shape focuses the jet upward, which helps deliver the tall, narrow column that’s so photogenic.
17) Boiling Point Here Isn’t Your Kitchen Boil
Water boils at a lower number at this elevation than at sea level. That’s why the pre-eruption vent temperature sits near the local boil yet still sends out fierce steam once pressure drops.
18) Eruption Windows Shift With Quakes
Regional earthquakes can tweak subsurface cracks and water levels. Over long spans, average intervals have stretched compared with mid-20th-century measurements. Day to day, though, the posted window still guides your plan.
19) The Basin’s River And Boardwalk Layout
The Firehole River threads the basin. Bridges and loops give several viewing angles while keeping feet on sturdy ground. Please move along after the show so others can reach the front rows for the next window.
20) Respect Brings Rewards
Follow the signs, give the cone a wide berth, and pack out trash. Your reward: a safe view of one of Earth’s most reliable water cannons, often with bison grazing in the distance and the Inn’s roofline peeking through the steam.
Old Faithful Facts At A Glance (Table 1)
This quick table compresses the core measurements visitors ask about. It’s broad by design, so you can compare the classic “how tall, how long, how hot” at a glance.
| Measure | Typical Range | Notes |
|---|---|---|
| Interval Between Eruptions | ~50–127 minutes | Average near 90 minutes; prediction posted as a time window. |
| Duration Of Eruption | ~1.5–5 minutes | Shorter burst → shorter next wait; longer burst → longer wait. |
| Height Of Water Column | ~100–180 feet | Wind can shear the plume; cross-wind angles frame better photos. |
| Water Discharged | ~3,700–8,400 gallons | More water during longer displays. |
| Vent Temperature | Near 204°F (96°C) | Local boiling point at basin elevation sits near 199°F (93°C). |
Smart Planning: Timing, Spots, And Safe Behavior
Use Posted Windows Like A Pro
Arrive ten to fifteen minutes before the start of the posted window. That buffer lets you settle into a good angle, check wind, and dial in camera settings. If you reach the benches right at the window’s end, you may meet a wall of backs and hats.
Where To Stand When It’s Breezy
Check the flag by the Visitor Education Center or any tall tree line. Stand upwind or cross-wind from the cone so the plume stays off your lens. If the spray drifts toward you, step to the side rather than backing into another viewer.
Watch From Above For A Basin-Wide View
Observation Point sits a short walk away and lines up the cone, the river, and the boardwalks in one frame. It’s a solid call when mid-day crowds pack the lower loop.
Respect The Boardwalk Rules
Thermal ground looks firm until it doesn’t. Scalding water hides inches below crust near many vents. Stay on the boardwalks, keep drones grounded, and give wildlife room. Rangers issue citations for stepping off pathways near hot features because lives are on the line.
Prediction In Plain English (Table 2)
This table sums up the simple relationship rangers use when posting the next eruption window. It’s easy to remember and handy when you’re timing a return from a snack break.
| Prior Eruption Length | Typical Next Interval | What To Do |
|---|---|---|
| Under ~2.5 minutes | About an hour (±10 minutes) | Don’t wander far; a quick loop keeps you close. |
| Over ~2.5 minutes | About an hour and a half (±10 minutes) | Plenty of time to check nearby features and return. |
Deep-Dive Details Without The Jargon
What Fuels The Heat
A shallow magma body under Yellowstone provides the heat source. Rain and snow sink, warm up, and circulate through cracks. Pressure builds, and when conditions line up, the system vents as a water jet and steam cloud.
Why This Cone Keeps Its Rhythm
Many geysers share plumbing with neighbors, so one blast steals heat or water from another. This cone seems more isolated, so cycles run with fewer interruptions. That’s why a printed window near the Visitor Education Center works so well here.
Historic Measurements Show A Slow Shift
Mid-century records list shorter average gaps than recent decades. Earthquakes and subtle plumbing changes likely nudged the refill timing. You’ll still see the same style of show; you just wait a bit longer on average.
What “Boiling” Means At This Elevation
At over 7,000 feet, water boils at a lower number than at sea level. Near the vent, readings line up near that local boil. Deeper in the system, super-heated water holds more energy and flashes to steam as pressure drops, powering the jet.
Two Handy Links While You’re Planning
You can scan a live stream and daily windows on the park’s webcams page. For specs, ranges, and a concise overview, the park’s Old Faithful page lays out intervals, durations, and heights in plain language.
Photo And Video Tips That Work Here
Beat Glare And Steam
Set exposure for the white column, not the dark crowd. A circular polarizer trims glare on sunny days. On cold mornings, step farther back so steam doesn’t fill the frame.
Pick A Shutter Speed For The Look You Want
Use a fast shutter for sharp droplets and a slower one for silky motion. Burst mode helps catch the moment the column peaks. If the wind shifts, move your feet rather than lifting your rig over people.
Keep Gear Safe Around Spray
Pack a microfiber cloth in a pocket. Wipe lenses fast, then stash the cloth again so grit doesn’t smear the next pass. A simple rain cover helps when the plume drifts your way.
Safety Reminders Worth Repeating
Stay on signed paths in thermal areas. Keep children beside you, not sprinting ahead. Give bison, elk, and every large animal a wide berth. If a hat blows toward a pool, let it go. Rangers and signs exist to keep people out of boiling water and to protect fragile ground that can collapse without warning.
Quick Recap For Busy Travelers
- Plan for a ~90-minute cycle, with a posted window you can rely on.
- Expect a minute-plus to five-minute show that clears a hundred feet.
- Use the simple “short show = shorter wait; long show = longer wait” rule between windows.
- Pick your spot early, mind the wind, and stay on the boardwalk.
- Check the live stream and posted times if you’re juggling lunch or a trail.