Main Section


Run from below the Gnar Section to Idylwilde Dam.

Suggested river levels for paddling this section of the Big Thompson are between a bare minimum of 300cfs and a high of 1,100cfs. River conditions sourced from USGS 06660000, the Laramie River At Laramie Remember only watercraft are permitted at Main Section.

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Area Hydrology

Gauge Streamflow Stage
Michigan River Near Cameron Pass
USGS 06614800
0 cfs 2.3 ft
Bear Creek Above Bear Creek Lake Near Morrison
USGS 06710605
8 cfs 3.7 ft
S Clear Cr Abv Lwr Cabin Cr Res Spilwy Nr Georgtwn
USGS 06714500
5 cfs 0.5 ft
South Platte River At South Platte
USGS 06707500
588 cfs 3.3 ft
Colorado River Bl Shadow Mountain Reservoir
USGS 09015000
36 cfs 1.6 ft
Cabin Creek Near Fraser
USGS 09032100
2 cfs 1.7 ft
First Cr Bel Buckley Rd
USGS 06720460
3 cfs 1.9 ft
Cache La Poudre R A Mo Of Cn
USGS 06752000
77 cfs 3.0 ft
Keystone Gulch Near Dillon
USGS 09047700
3 cfs 2.0 ft
Leavenworth Creek @ Mouth Nr Georgetown
USGS 06714800
4 cfs 3.6 ft
Snotel Site Snowpack 24hr Change
Jackwhacker Gulch
SNOTEL 935
1" 1"
Black Mountain
SNOTEL 1161
1" 1"
Rawah
SNOTEL 1032
6" 0"
Crow Creek
SNOTEL 1045
1" 1"
Never Summer
SNOTEL 1031
1" 0"
Echo Lake
SNOTEL 936
1" 0"
Stillwater Creek
SNOTEL 793
1" 1"
Lake Irene
SNOTEL 565
1" 0"
Loveland Basin
SNOTEL 602
1" 1"

Outdoor Recreation

Campground Campsites Reservations Toilets Showers Elevation
Narrows 5 6,470 ft
Kelly Dahl 46 8,615 ft
Flatiron Reservoir None 5,483 ft
Hermit Park Open Space None 8,313 ft
Mountain Park 54 6,678 ft
Meadow Park None 5,349 ft
Pinewood Reservoir 22 6,604 ft
Lower Narrows 8 6,470 ft
Kelly Flats 29 6,751 ft
Dutch George 20 6,520 ft
Stove Prairie 9 6,068 ft
Ansel Watrous 16 5,839 ft
Peaceful Valley 17 8,552 ft
Reverends Ridge - Golden Gate State Park 106 9,105 ft
Ski Area Snowpack Air Temperature 5 Day Forecast
Echo Mountain Park 1" 61° 0"
Eldora Mountain Resort -1" 66° 0"
Ski Estes Park (Hidden Valley) -1" 65° 0"
River Run Streamflow Length Class
Middle Narrows 76.7cfs 1.0 Mi IV to V-
Lower Narrows 76.7cfs 0.5 Mi V- to V+
October Hole 17.4cfs None Mi II
Upper South Boulder Creek 26.6cfs None Mi V+
Lower Boulder Canyon 13.7cfs None Mi IV- to V-
Rustic (Upper) 76.7cfs 20.0 Mi III to III+
SSV - Confluence to Picnic Grounds 17.4cfs 5.0 Mi V to V+
Tunnel 1 to Golden Whitewater Park 74.7cfs None Mi III- to III+
Gnar Section 588.0cfs 1.0 Mi V+
Lower North Fork 76.7cfs 11.0 Mi III
Upper South Boulder Creek 26.6cfs None Mi V+
Filter Plant 2.85cfs None Mi II to III+
Main Section 7.98cfs 3.0 Mi IV+ to V
Upper Clear Creek 74.7cfs 2.5 Mi IV- to IV+
Steven's Gulch to Bridges Take Out 76.7cfs 12.0 Mi III- to IV+
Upper North Fork 66.2cfs 9.0 Mi IV+ to V-
Idledale to Morrison 8.83cfs 3.0 Mi IV+ to V
NSV 17.4cfs 13.0 Mi V+
Filter Plant 2.85cfs None Mi II to III+
Golden Whitewater Park 2.85cfs 0.75 Mi II+
Upper Narrows 76.7cfs 0.5 Mi V- to V+