Real-Time USGS Data

BOULDER WATER REPORT

Know Before You Go — Live Flow Conditions for Every River Near Boulder

//LIVE CONDITIONS

Current Flow Readings

Updated March 28, 2026 — Off Season
UPPER BOULDER CREEK
164
CFS
In Season
LOWER BOULDER CREEK
85
CFS
In Season
LYONS
214
CFS
Off Season
ST. VRAIN GREENWAY
21
CFS
In Season
GOLDEN
210
CFS
In Season
//WHY CHECK THE WATER

The Creek Changes Every Day

Boulder Creek can go from a lazy float to a raging torrent overnight. One warm day in the mountains and snowmelt can double the flow by afternoon. We've seen people show up with tubes when the creek is running 400 CFS — that's not tubing weather, that's rescue weather.

We built this page because we got tired of answering the same question 50 times a day: "Is the creek good today?" Now you can check before you leave the house. We pull live USGS gauge data for every river worth floating near Boulder.

We're located at 2709 Spruce St, about 5 minutes from the creek. We inflate your tubes and strap them to your vehicle — you show up at the water ready to go. If the numbers below look confusing, just call us — (303) 443-0814. We check conditions every morning and we'll tell you straight.

//BOULDER CREEK

Boulder Creek at 75th Street

USGS Gauge #06730200 — This is the gauge that matters for tubing in Boulder. It sits at 75th Street on the east side of town and gives you the most accurate read on what the creek is doing right now.

Under 50 CFS — Too Low
You'll be dragging your tube over rocks. Skip it. Go to a reservoir or rent a SUP at Gross Reservoir instead.

50–100 CFS — Beginner
Mellow float. Perfect for families, first-timers, and anyone who just wants to drift and drink a beer. This is the sweet spot for most people. A typical float takes about 45 minutes.

100–150 CFS — Intermediate
Faster current, some fun rapids forming. You'll want water shoes — you're going to bounce off a few rocks. Still great but pay attention. Life jacket required.

150–225 CFS — Expert
Real current now. Strong swimmers only. The creek moves fast and there are obstacles. We'll ask if you've been on the creek before renting to you at this level.

225+ CFS — Danger Zone
You better know what you're doing. This is kayak-and-helmet territory, not tube-and-cooler territory. We won't rent tubes above this level. Period.

Season: Late May through early September. Best conditions are typically June–July when snowmelt keeps flows in the 50–150 CFS sweet spot. Early season (May) the water is cold — wetsuit recommended. We rent those too.

Float time: 30–60 minutes depending on flow
Pro tip: Stop by the shop before you go — we'll point you in the right direction and make sure you've got the right gear for the day's conditions.

//GEAR CHECKLIST

WHAT TO BRING

Don't show up unprepared.
Here's what you actually need.

LIFE JACKET

Colorado law requires them
on most waterways. We rent
adult and youth sizes — $5/day.

WATER SHOES

The creek bottom is sharp rocks.
Flip-flops will come off. We sell
and rent proper water shoes.

SUNSCREEN + WATER

Boulder sun is no joke at 5,430 ft.
You'll burn fast on the water.
Bring a bottle — dehydration is real.

DRY BAG FOR YOUR PHONE

We've fished more phones out of
the creek than we can count.
Rent a dry bag — $3/day. Worth it.

//UPPER COLORADO RIVER

Upper Colorado River at Dotsero

USGS Gauge #09070500 — About 90 minutes west on I-70. This is a full-day adventure and completely worth the drive. Miles of canyon floating with mountain views you can't get anywhere on the Front Range.

300–800 CFS — Mellow to Moderate
Great for tubing all sections. Relaxing float with some easy rapids. Families welcome.

800–1,500 CFS — Solid Flow
Fun tubing with stronger current. You need to be a confident swimmer. Rapids are real but manageable.

1,500–3,000 CFS — Advanced Only
Fast current, big waves, serious water. Experienced paddlers in kayaks — not tubes.

3,000+ CFS — Stay Off
Spring runoff levels. Dangerous for everyone except expert whitewater kayakers.

Float time: 2–4 hours depending on section and flow
Pro tip: Pack lunch, extra water, and sunscreen. No services on the river. Stop by the shop before your trip — we'll help you plan the day. Check our Upper Colorado tubing guide for detailed put-in/take-out info and what to expect.

//MORE WATERWAYS

OTHER RIVERS
NEAR BOULDER

Boulder Creek too crowded?
Here's where else to go.

1

ST. VRAIN CREEK — LYONS

USGS Gauge #06724000

20 minutes north of Boulder in Lyons. Ideal tubing range is 100–300 CFS. Mellower than Boulder Creek and way less crowded — this is the local's pick on busy summer weekends.

Vibe: Chill small-town float

2

CLEAR CREEK — GOLDEN

USGS Gauge #06719505

30 minutes south in Golden. Not for tubing. This is a technical whitewater creek for experienced kayakers and SUP paddlers. Great park-and-play waves for the Hovercraft Fakie.

Best for: Kayaks, whitewater SUP
Vibe: Serious paddlers only

3

GROSS RESERVOIR

When the creek is too low for tubing, head to Gross Reservoir — 20 minutes up Flagstaff. Flat water, mountain views, and perfect for SUP and kayaking.

Requires a Boulder County parks pass ($10/day at the gate).

Best for: SUP, kayaking, swimming
Vibe: Calm mountain lake

//SAFETY FIRST

RIVER SAFETY

We want you back next summer.
Read this before you go.

CHECK CFS THAT MORNING

Conditions change overnight.
Don't rely on yesterday's numbers.
Check the gauge before you leave.

WEAR THE LIFE JACKET

We know, it's not cool. Neither is
drowning. Colorado law requires
them and so do we.

RESPECT THE WATER

The creek looks friendly until it isn't.
Higher CFS = faster, colder, and
less forgiving. Stay in your lane.

TELL SOMEONE YOUR PLAN

Let someone know where you're
floating and when you'll be back.
Keep your phone in a dry bag.

//RENT GEAR

Walk In. Gear Up. Get On the Water.

We rent everything you need — tubes (single and double), inflatable kayaks, stand-up paddle boards, life jackets, water shoes, wetsuits for cold early-season water, and dry bags for your phone and keys.

No reservation needed. Walk in during business hours and you're on the water in 5 minutes. Our shop is at 2709 Spruce St, about 5 minutes from the creek. We inflate your tubes and strap them to your vehicle — you show up at the water ready to go.

We check conditions every morning and we will not rent when it's unsafe. If you show up and we tell you the creek is too high, trust us — we're saving you a trip to the ER.

Hours: Mon–Sat 10am–7pm, Sun 12pm–6pm
Phone: (303) 443-0814

riverskate product on water
//ONLY AT SKIBOULDER

Try the Hovercraft Fakie

We're the only shop on Colorado's Front Range renting the River Skate Collective Hovercraft Fakie — the world's first freestyle whitewater SUP.

Ultra-low volume board with patent-pending Grab Wings designed for linked vertical maneuvers on moving water. It's the most fun you can have standing up on Boulder Creek.

Perfect for Boulder Creek play waves at 50–150 CFS and Clear Creek park-and-play in Golden. No whitewater experience required — just a willingness to get wet and laugh at yourself.

Walk in, get sized, and hit the water. We'll show you the basics before you go.

// FAQS

Frequently Asked Questions

01 What CFS is safe for tubing on Boulder Creek?

Under 50 CFS is too low — you'll drag on rocks. 50–100 is beginner-friendly, perfect for families. 100–150 is intermediate with faster current. 150–225 is expert level — strong swimmers only. Above 225 CFS we won't rent tubes. We check conditions every morning and will tell you straight if it's not a good day. Call us at (303) 443-0814 for a quick conditions update.

02 When is tubing season in Boulder?

Late May through early September. Peak conditions are June and July when snowmelt keeps Boulder Creek in the 50–150 CFS sweet spot. Early season (May) is cold — we rent wetsuits. Late season (August–September) flows drop but are usually still floatable. The last two weeks of August can get too low some years.

03 Where do I start and how long is the float?

The float takes 30–60 minutes depending on water flow. Stop by our shop first — we're at 2709 Spruce St, about 5 minutes from the creek. We inflate your tubes and strap them to your vehicle — you show up at the water ready to go. We'll get you set up with gear, give you the rundown on current conditions, and point you to the best spot to drop in for the day. That's part of the service when you rent from us.

04 What gear do I need? Do you rent everything?

You need a tube, life jacket, and water shoes at minimum. We rent all three plus double tubes, inflatable kayaks, SUPs, the Hovercraft Fakie whitewater SUP, wetsuits (early season), and dry bags. No reservation needed — walk in anytime during business hours. Visit our summer rentals page for full pricing and gear details.

05 Is Boulder Creek safe for kids?

Late May through early September. Peak conditions are June and July when snowmelt keeps Boulder Creek in the 50–150 CFS sweet spot. Early season (May) is cold — we rent wetsuits. Late season (August–September) flows drop but are usually still floatable. The last two weeks of August can get too low some years.

06 Can I bring my dog on the creek?

Dogs love Boulder Creek and you'll see them everywhere. They don't need a tube — most dogs just swim alongside you or wade in the shallows. Keep them on leash until you're at the water (Boulder leash laws). Life jackets for dogs are a good idea in faster water. We don't rent dog life jackets but REI on Pearl Street does.

07 What's the best alternative when Boulder Creek is too low?

When the creek drops below 50 CFS, head to Gross Reservoir (20 min up Flagstaff) for SUP and kayaking on flat water, or St. Vrain Creek in Lyons (20 min north) which sometimes runs higher than Boulder Creek. We rent inflatable kayaks and SUPs that work great on reservoirs.

08 How accurate is the USGS gauge data?

Very accurate — USGS updates readings every 15 minutes via automated sensors. The 75th Street gauge (#06730200) is the standard reference for Boulder Creek conditions. Keep in mind that afternoon thunderstorms can spike flows quickly, so check again if the weather changes. We also check conditions in person every morning from our shop on the Creek Path.

When the creek drops below 50 CFS, head to Gross Reservoir (20 min up Flagstaff) for SUP and kayaking on flat water, or St. Vrain Creek in Lyons (20 min north) which sometimes runs higher than Boulder Creek. We rent inflatable kayaks and SUPs that work great on reservoirs.

BOULDER CREEK

CLEAR CREEK

ST. VRAIN

COLORADO RIVER

GROSS RESERVOIR