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RiverBrain

Colorado – US

Class
IV+ to V
Length
3 Mile(s)
Put-in elevation
6,648 Feet
Take-out elevation
6,029 Feet
Typical season
January to January
Author
KSC, Joshua Darnell

Current Flow

95 CFS

Gauge height: 1.4 FT

Reading from Jul 10, 2026 10:20 PM

0.09/hr (12h) 0.05/hr (24h)

Too Low

Don't bother

Primary gauge
BIG THOMPSON RIVER BELOW LAKE ESTES Gauge detail & alternatives Live gauge ↗

Recommended levels

Minimum300
Average550
Maximum1,100

Recommended use

  • Kayaking
  • Rafting
  • Canoeing
  • SUP
  • Packrafting
  • Fishing

Struck-through craft are not recommended for this run.

Flow history — last 6 days

Photos

No photos added for this run yet.

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Description

Run from below the Gnar Section to Idylwilde Dam. 

At normal flows this is a class IV run with a character similar to its neighbor to south, Clear Creek, except a little steeper and more continuous.  Those looking for a little more excitement can start by running the last drop of the Gnar section, Cannon Shot, one of the cleaner rapids in the Gnar section.

Below Cannon Shot, is continuous read and run class IV whitewater.  At lower flows mank is your biggest enemy, but as flows increase above 550 cfs, some hole punching is required to avoid an unexpected surf.  The Drake rapid occurs midway through the run and is usually scouted on the drive up via a large pullout by the river.  This is a long multi-tiered rapid, easily recognizable from the road.  It has a technical entrance to avoid pitoning/pinning in mank off a 5 foot ledge followed by a couple holes, a brief respite, and more holes below.  It's a frequent site of carnage.  At lower flows it's a solid IV+ and at higher flows moves into class V territory.  Portaging is fairly trivial along the highway.  Once the river passes Drake, the water mellows to class III/III+ until it pools up above the dam.  The dam has been run, but boaters should use extreme caution here due to the deadly hydrolic below.  If the flows are good, many will choose to continue for a another couple miles of fun whitewater below the dam. 

The character of this run changes dramatically with different water levels.  At lower flows (300-500), it's suitable for a class IV boater used to continuous runs.  At flows about 600 cfs, most class IV boaters will have their hands full as the holes get large, and the water moves quickly and with some push.  I ran this once on a 1100 cfs release from Lake Estes, chasing daylight, and it was one of the more intense runs I've ever done with fast pushy water, big holes, a flooded shoreline, and minimal eddies.

Put in: Below Canon Shot

Take out: At the Idylwilde Dam parking area

Rapids

No rapids added yet.

Access

Type Name Elevation Camping Water Boat ramp Vehicle access Description
Put-In Below the Gnar 6,648 Feet No No No All Vehicles
Take-Out Idylwilde Dam 6,029 Feet No No No All Vehicles

Camps

No river camps added yet.

Permit

No permit is required, or permit info hasn't been added yet.

Fishing

No fish species have been associated with this run yet.

Community Run Notes

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