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
Coal Creek Near Plainview
USGS 06730300
0 cfs 0.0 ft
Harvard Gulch At Harvard Park
USGS 06711575
2 cfs 10.2 ft
Grand River Ditch At La Poudre Pass
USGS 09010000
0 cfs 0.0 ft
Bear Creek Above Evergreen
USGS 06710385
22 cfs 4.4 ft
Cabin Creek Near Fraser
USGS 09032100
4 cfs 1.8 ft
Left Hand Creek Near Boulder
USGS 06724500
6 cfs 0.3 ft
South Platte R At 64Th Ave. Commerce City
USGS 06714215
12 cfs 1.5 ft
East Plum Cr Blw Haskins Gulch Nr Castle Rock
USGS 06708800
2 cfs 3.7 ft
St. Vrain Creek At Mouth
USGS 06731000
158 cfs 1.8 ft
Bobtail Creek Near Jones Pass
USGS 09034900
2 cfs 2.4 ft
Snotel Site Snowpack 24hr Change
Rawah
SNOTEL 1032
8" -1"
Jones Pass
SNOTEL 970
2" -6"
laramie 1se
SNOTEL ADFW4
1.77" -0.53"
Deadman Hill
SNOTEL 438
3" 0"
Never Summer
SNOTEL 1031
7" 0"
Crow Creek
SNOTEL 1045
3" 1"
Jackwhacker Gulch
SNOTEL 935
5" 0"
buford 4se
SNOTEL BFDW4
1.24" -0.72"
aspen springs amrad
SNOTEL ASIC2
0.24" -0.43"
Lake Eldora
SNOTEL 564
4" 1"
nederland 4.8 ene, co
SNOTEL CO-BO-110
0.35" -0.38"
Hourglass Lake
SNOTEL 1122
3" -181"
rollinsville 1.1 ssw, co
SNOTEL CO-GL-17
1.02" -0.36"
georgetown
SNOTEL GEOC2
0.47" -0.24"
Willow Park
SNOTEL 870
4" -2"
monument 2.1 ene, co
SNOTEL CO-EP-17
0.37" -0.34"
divide 4nw
SNOTEL DNWC2
0.11" -0.35"
red feather 5.9 ne, co
SNOTEL CO-LR-329
0.63" -0.7"
woodland park 1.1 nnw, co
SNOTEL CO-TL-28
0.49" -0.12"
Phantom Valley
SNOTEL 688
2" 0"
tabernash 2.7 nw, co
SNOTEL CO-GR-68
1.05" -0.3"
Black Mountain
SNOTEL 1161
4" 1"
ward 4.6 ne, co
SNOTEL CO-BO-202
0.93" -0.42"
Bear Lake
SNOTEL 322
3" 0"
Windy Peak
SNOTEL 872
4" 0"
Sawtooth
SNOTEL 1251
5" 0"
University Camp
SNOTEL 838
3" 0"
Lake Irene
SNOTEL 565
7" -1"
dillon 2.3 se, co
SNOTEL CO-SU-16
2.78" 1.32"
laramie 7sse
SNOTEL CMBW4
2.02" -0.56"
rollinsville 1.7 e, co
SNOTEL CO-GL-25
0.06" -0.29"
Long Draw Resv
SNOTEL 1123
6" -176"
Loveland Basin
SNOTEL 602
10" -1"
Berthoud Summit
SNOTEL 335
6" 1"
co st forest st park
SNOTEL CSFC2
4.01" -0.47"
Wild Basin
SNOTEL 1042
3" 0"
Grizzly Peak
SNOTEL 505
7" 1"
Echo Lake
SNOTEL 936
2" 0"
High Lonesome
SNOTEL 1187
6" 0"
cripple creek,co
SNOTEL CRIC2
0.09" 0.03"
cabin creek
SNOTEL GCRC2
1.69" -0.01"

Outdoor Recreation

Campground Campsites Reservations Toilets Showers Elevation
Dutch George 20 6,520 ft
Narrows 5 6,470 ft
Kelly Dahl 46 8,615 ft
Stove Prairie 9 6,068 ft
Lower Narrows 8 6,470 ft
Ansel Watrous 16 5,839 ft
Meadow Park None 5,349 ft
Pinewood Reservoir 22 6,604 ft
Flatiron Reservoir None 5,483 ft
Peaceful Valley 17 8,552 ft
Hermit Park Open Space None 8,313 ft
Mountain Park 54 6,678 ft
Kelly Flats 29 6,751 ft
Reverends Ridge - Golden Gate State Park 106 9,105 ft
Ski Area Snowpack Air Temperature 5 Day Forecast
Ski Estes Park (Hidden Valley) 3" 48° 1.17"
Eldora Mountain Resort 4" 49° 0.61"
Echo Mountain Park 2" 46° 0"
River Run Streamflow Length Class
Golden Whitewater Park 22.9cfs 0.75 Mi II+
Upper Clear Creek 68.6cfs 2.5 Mi IV- to IV+
NSV 19.2cfs 13.0 Mi V+
Upper North Fork 15.4cfs 9.0 Mi IV+ to V-
Lower Narrows 83.3cfs 0.5 Mi V- to V+
Steven's Gulch to Bridges Take Out 83.3cfs 12.0 Mi III- to IV+
Filter Plant 22.9cfs None Mi II to III+
October Hole 19.2cfs None Mi II
Gnar Section 342.0cfs 1.0 Mi V+
Lower North Fork 83.3cfs 11.0 Mi III
Upper South Boulder Creek 79.5cfs None Mi V+
Middle Narrows 83.3cfs 1.0 Mi IV to V-
Rustic (Upper) 83.3cfs 20.0 Mi III to III+
Main Section 37.7cfs 3.0 Mi IV+ to V
Upper Narrows 83.3cfs 0.5 Mi V- to V+
Idledale to Morrison 15.5cfs 3.0 Mi IV+ to V
Lower Boulder Canyon 29.6cfs None Mi IV- to V-
Filter Plant 22.9cfs None Mi II to III+
SSV - Confluence to Picnic Grounds 19.2cfs 5.0 Mi V to V+
Upper South Boulder Creek 79.5cfs None Mi V+
Tunnel 1 to Golden Whitewater Park 68.6cfs None Mi III- to III+