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
Ranch Creek Near Fraser
USGS 09032000
4 cfs 4.6 ft
Big Thompson River At Loveland
USGS 06741510
9 cfs 0.7 ft
Cherry Creek Below Cherry Creek Lake
USGS 06713000
36 cfs 4.7 ft
South Platte River At Waterton
USGS 06708000
21 cfs 0.6 ft
West Fork Clear Creek Abv Mouth Nr Empire
USGS 06716100
17 cfs 4.3 ft
Grand River Ditch At La Poudre Pass
USGS 09010000
-999 cfs 0.0 ft
South Platte River Below Union Ave
USGS 06710247
89 cfs 11.2 ft
Boulder Creek At Mouth
USGS 06730500
51 cfs 9.8 ft
Colorado River Bl Shadow Mountain Reservoir
USGS 09015000
20 cfs 1.4 ft
South Platte R At 64Th Ave. Commerce City
USGS 06714215
9 cfs 1.4 ft
Snotel Site Snowpack 24hr Change
wellington 0.4 nw, co
SNOTEL CO-LR-952
1.7" 0"
fcl 3.0 w, co
SNOTEL CO-LR-284
3.84" 3.18"
fcl 2.3 nw, co
SNOTEL CO-LR-311
3.29" 2.75"
bellvue 5.9 w, co
SNOTEL CO-LR-4
5.28" 3.53"
englewood #2
SNOTEL ENLC2
0.54" 0"
Phantom Valley
SNOTEL 688
20" 3"
rollinsville 1.7 e, co
SNOTEL CO-GL-25
3.69" 2.36"
cr66
SNOTEL GEYC2
0.62" 0"
fcl 2.55 ne, co
SNOTEL CO-LR-340
2.76" 2.36"
Windy Peak
SNOTEL 872
34" -1"
fort collins 4.6 n, co
SNOTEL CO-LR-762
2.53" 2.2"
erie 1.7 wnw, co
SNOTEL CO-BO-285
0.64" 0"
broomfield 3.2 nne, co
SNOTEL CO-BR-32
0.69" 0"
florissant 5.0 n, co
SNOTEL CO-TL-19
0.62" 0.09"
woodland park 1.1 nnw, co
SNOTEL CO-TL-28
0.11" 0.05"
fort collins 5.4 wsw, co
SNOTEL CO-LR-623
5.32" 4.46"
fort collins
SNOTEL FORC2
3.19" 2.72"
boulder 1.5 nnw, co
SNOTEL CO-BO-496
1.01" 0"
berthoud 4.4 wsw, co
SNOTEL CO-LR-922
3.24" 2.91"
fort lupton 7.4 nw, co
SNOTEL CO-WE-326
0.11" 0"
greeley 2.6 w, co
SNOTEL CO-WE-171
0.59" 0"
tabernash 2.7 nw, co
SNOTEL CO-GR-68
0.36" 0"
denver 6.1 wsw, co
SNOTEL CO-JF-3
0.35" 0"
rollinsville 1.1 ssw, co
SNOTEL CO-GL-17
12.99" 2.67"
conifer 3.2 sw, co
SNOTEL CO-JF-53
4.5" 2.5"
longmont 3.3 sw, co
SNOTEL CO-BO-507
0.51" 0"
greeley 4.6 wnw, co
SNOTEL CO-WE-318
0.65" 0"
Hourglass Lake
SNOTEL 1122
41" 6"
cabin creek
SNOTEL GCRC2
20.91" 4.1"
longmont 8.2 ese, co
SNOTEL CO-WE-203
0.12" 0"
ralston reservoir
SNOTEL GDNC2
2.39" 2.25"
Willow Park
SNOTEL 870
58" 3"
lyons 4.8 n, co
SNOTEL CO-LR-50
6.67" 5.46"
longmont 3.0 sw, co
SNOTEL CO-BO-435
0.48" 0"
colorado springs 6.9 ne, co
SNOTEL CO-EP-282
0.68" 0"
cripple creek,co
SNOTEL CRIC2
0.07" 0"
Berthoud Summit
SNOTEL 335
59" 6"
estes park 1.8 s, co
SNOTEL CO-LR-767
6.5" 3.31"
evergreen 5 w, co
SNOTEL CO-CC-2
5.48" 3.83"
evergreen
SNOTEL EVGC2
3.45" 2.63"
virginia dale 7.2 ssw, co
SNOTEL CO-LR-672
4.86" 3.73"
nederland 5.8 e, co
SNOTEL CO-BO-57
4.54" 2.66"
Never Summer
SNOTEL 1031
49" 7"
estes park 3.3 ssw, co
SNOTEL CO-LR-247
7.49" 3.73"
glen haven 1.2 n, co
SNOTEL CO-LR-868
5.65" 2.58"
highlands ranch 3.2 ese, co
SNOTEL CO-DG-74
2.17" 0"
aurora 5 se
SNOTEL AUOC2
0.49" 0"
grant
SNOTEL GRTC2
7.58" 2.98"
lakewood 1.7 sw, co
SNOTEL CO-JF-333
0.47" 0"
lake george 7.2 wnw, co
SNOTEL CO-PK-39
1.35" 0.15"
boulder 2.9 s, co
SNOTEL CO-BO-4
0.96" 0"
erie 1.7 wnw, co
SNOTEL CO-BO-455
0.72" 0"
lafayette 2.5 nw, co
SNOTEL CO-BO-222
0.4" 0"
gleneagle 0.4 wnw, co
SNOTEL CO-EP-61
1.02" 0"
fcl 2.2 nw, co
SNOTEL CO-LR-273
3.22" 2.7"
longmont 2.1 n, co
SNOTEL CO-BO-143
0.49" 0"
University Camp
SNOTEL 838
55" 4"
fort collins 5.5 s, co
SNOTEL CO-LR-1100
3.84" 3.27"
arvada 3.5 wnw, co
SNOTEL CO-JF-457
0.53" 0"
aurora 4.0 sse, co
SNOTEL CO-AR-259
0.42" 0"
monument 2.1 ene, co
SNOTEL CO-EP-17
1.21" 0"
co st forest st park
SNOTEL CSFC2
2.29" 2.25"
monument 3s
SNOTEL DMDC2
0.81" 0"
nederland 2.61 nne, co
SNOTEL CO-BO-75
6.13" 3.25"
Michigan Creek
SNOTEL 937
36" 0"
lyons 0.3 nne, co
SNOTEL CO-BO-146
4.7" 4.13"
lafayette 0.4 wsw, co
SNOTEL CO-BO-8
1.24" 0"
parker 3.5 wnw, co
SNOTEL CO-DG-292
1.18" 0"
westminster 2.3 sse, co
SNOTEL CO-AD-225
1.17" 0"
wellington 0.8 sw, co
SNOTEL CO-LR-1008
1.71" 0"
estes park 10.5 se, co
SNOTEL CO-LR-1019
9.48" 6.28"
fcl 3.0 sw, co
SNOTEL CO-LR-391
4.4" 3.7"
Copeland Lake
SNOTEL 412
10" 4"
wellington 3.7 wnw, co
SNOTEL CO-LR-918
1.69" 0"
Wild Basin
SNOTEL 1042
43" 0"
allens park 1.5 ese, co
SNOTEL CO-BO-22
12.21" 7.12"
loveland 2.3 nw, co
SNOTEL CO-LR-854
4.56" 3.82"
windsor 3.0 sse, co
SNOTEL CO-WE-507
1.01" 0"
fcl 5.6 e, co
SNOTEL CO-LR-393
2.6" 0"
erie 1.5 nne, co
SNOTEL CO-WE-511
0.16" 0"
nederland 4.8 ene, co
SNOTEL CO-BO-110
4.98" 2.77"
fcl 7.9 ene, co
SNOTEL CO-WE-250
2.59" 0"
Rawah
SNOTEL 1032
23" 6"
evergreen 3.4 wnw, co
SNOTEL CO-CC-22
5.47" 3.88"
nederland 3.7 ene, co
SNOTEL CO-BO-296
5.43" 2.94"
carr 0.6 s, co
SNOTEL CO-WE-127
1.58" 0"
highlands ranch 1.1 ene, co
SNOTEL CO-DG-165
1.96" 0"
laramie 1se
SNOTEL ADFW4
0.79" 0.21"
denver 0.4 e, co
SNOTEL CO-DN-175
0.43" 0"
fort collins 0.9 n, co
SNOTEL CO-LR-849
3.15" 2.71"
fort collins 4.2 s, co
SNOTEL CO-LR-758
1.94" 0"
fort collins 2.8 wsw, co
SNOTEL CO-LR-75
4.19" 3.52"
windsor 3.8 wsw, co
SNOTEL CO-LR-845
1.73" 0"
boulder 2.1 w, co
SNOTEL CO-BO-437
1.53" 1.22"
evergreen 4.2 sse, co
SNOTEL CO-JF-157
4.54" 3.17"
Jackwhacker Gulch
SNOTEL 935
39" 3"
niwot 2.3 w, co
SNOTEL CO-BO-248
0.67" 0"
red feather 5.9 ne, co
SNOTEL CO-LR-329
5.57" 3.71"
lafayette 2.3 nw, co
SNOTEL CO-BO-290
1.34" 0"
hygiene,co
SNOTEL HGIC2
0.66" 0"
erie 1.6 ne, co
SNOTEL CO-WE-209
0.14" 0"
black forest 6wnw
SNOTEL BKFC2
1" 0"
littleton 6.4 w, co
SNOTEL CO-JF-212
1.44" 1.19"
lov 3.4 s, co
SNOTEL CO-LR-472
2.65" 2.06"
nederland 0.4 wnw, co
SNOTEL CO-BO-322
5.74" 3.27"
fort collins 2.8 w, co
SNOTEL CO-LR-1009
3.93" 3.29"
laporte 1.4 nw, co
SNOTEL CO-LR-761
2.93" 2.46"
boulder 2.0 w, co
SNOTEL CO-BO-380
1.43" 1.13"
fcl 1.7 se, co
SNOTEL CO-LR-295
3.4" 2.91"
wheat ridge 2.8 wsw, co
SNOTEL CO-JF-290
0.34" 0"
boulder 4.7 ene, co
SNOTEL CO-BO-220
0.55" 0"
south platte river
SNOTEL ANTC2
2.42" -0.32"
cheyenne wfo
SNOTEL CYSW4
1.95" 1.65"
cheesman
SNOTEL CHEC2
1.02" 0"
Sawtooth
SNOTEL 1251
63" 4"
laramie 7sse
SNOTEL CMBW4
0.93" 0.33"
boulder 1.5 wnw, co
SNOTEL CO-BO-490
1.41" 1.17"
golden 12.5 nw, co
SNOTEL CO-JF-331
3.71" 2.56"
lafayette 0.8 wsw, co
SNOTEL CO-BO-266
1.35" 0"
loveland 1.5 n, co
SNOTEL CO-LR-40
3.95" 3.31"
nederland 4.2 e, co
SNOTEL CO-BO-233
4.68" 2.68"
loveland 2.7 e, co
SNOTEL CO-LR-687
1.79" 0"
fort collins 3.7 s, co
SNOTEL CO-LR-885
3.81" 3.26"
estes park,co
SNOTEL ETSC2
5.8" 2.92"
aurora 2.1 ese, co
SNOTEL CO-AR-313
0.5" 0"
lakewood 2.2 ese, co
SNOTEL CO-JF-179
1.41" 0"
fort collins 1.2 nne, co
SNOTEL CO-LR-1137
3.02" 2.59"
boulder 2.2 nw, co
SNOTEL CO-BO-452
2.23" 1.87"
Bear Lake
SNOTEL 322
57" 8"
fort collins 3.9 nne, co
SNOTEL CO-LR-112
2.32" 0"
nunn 1.2 ene, co
SNOTEL CO-WE-345
2.01" 0"
broomfield 2.3 ssw, co
SNOTEL CO-JF-72
1.3" 0"
Crow Creek
SNOTEL 1045
12" 0"
aurora south
SNOTEL EAGC2
0.86" 0"
loveland 3.0 nne, co
SNOTEL CO-LR-104
2.07" 1.51"
estes park 1.8 sse, co
SNOTEL CO-LR-987
6.43" 3.25"
evergreen 6.5 wsw, co
SNOTEL CO-CC-1
6.02" 4.06"
highlands ranch 2.5 ssw, co
SNOTEL CO-DG-178
1.9" 0"
berthoud
SNOTEL ERTC2
1.63" 1.33"
aspen springs amrad
SNOTEL ASIC2
3.7" 2.65"
parker 2.1 wnw, co
SNOTEL CO-DG-146
0.82" 0"
la porte 10.0 nnw, co
SNOTEL CO-LR-567
3.42" 3.18"
longmont 1.8 ene, co
SNOTEL CO-BO-352
0.38" 0"
longmont 5.1 e, co
SNOTEL CO-WE-302
0.24" 0"
livermore 9.9 wsw, co
SNOTEL CO-LR-897
5.22" 3.74"
bailey
SNOTEL BLYC2
3.18" 1.1"
evergreen 2.0 ese, co
SNOTEL CO-JF-395
3.84" 2.77"
Loveland Basin
SNOTEL 602
60" 5"
Jones Pass
SNOTEL 970
39" 6"
longmont 1.8 e, co
SNOTEL CO-BO-361
0.34" 0"
arvada 4.7 w, co
SNOTEL CO-JF-455
0.5" 0"
evergreen 1.3 nne, co
SNOTEL CO-JF-424
3.68" 2.84"
highlands ranch 0.6 sse, co
SNOTEL CO-DG-176
2.03" 0"
gross reservoir
SNOTEL GRRC2
2.96" 2.16"
boulder 1.8 w, co
SNOTEL CO-BO-491
1.53" 1.22"
westminster 1.6 ne, co
SNOTEL CO-AD-153
1" 0"
firestone
SNOTEL FSNC2
0.14" 0"
fcl 1.7 sw, co
SNOTEL CO-LR-320
3.97" 3.34"
amrad
SNOTEL CNRC2
5.56" 3.34"
fort collins 9.6 se, co
SNOTEL CO-LR-630
1.66" 0"
boulder 1.6 s, co
SNOTEL CO-BO-14
1.07" 0.99"
loveland 2.4 nw, co
SNOTEL CO-LR-676
4.56" 3.82"
fort collins 4.9 n, co
SNOTEL CO-LR-1020
2.44" 2.13"
ward 4.6 ne, co
SNOTEL CO-BO-202
11.48" 6.42"
castle rock 1.7 ssw, co
SNOTEL CO-DG-62
0.91" 0.89"
fort collins 1.1 wnw, co
SNOTEL CO-LR-863
3.51" 2.97"
jamestown 2.5 sse, co
SNOTEL CO-BO-343
6.12" 3.61"
denver 8 ssw, co
SNOTEL CO-DN-30
0.99" 0"
fort collins 3.4 n, co
SNOTEL CO-LR-653
2.76" 2.36"
buford 4se
SNOTEL BFDW4
2.6" 2.07"
estes park 1.7 w, co
SNOTEL CO-LR-1115
6.41" 2.99"
conifer 5.7 sw, co
SNOTEL CO-JF-222
3.78" 1.72"
boulder 1.9 se, co
SNOTEL CO-BO-30
0.7" 0"
loveland 2.8 wnw, co
SNOTEL CO-LR-1109
4.93" 4.16"
georgetown
SNOTEL GEOC2
4.14" 2.84"
boulder 4.7 e, co
SNOTEL CO-BO-67
0.64" 0"
niwot 0.7 nnw, co
SNOTEL CO-BO-338
0.55" 0"
littleton 6.0 w, co
SNOTEL CO-JF-376
0.26" 0.13"
thornton 2.1 n, co
SNOTEL CO-AD-100
0.26" 0"

Outdoor Recreation

Campground Campsites Reservations Toilets Showers Elevation
Narrows 5 6,470 ft
Meadow Park None 5,349 ft
Reverends Ridge - Golden Gate State Park 106 9,105 ft
Peaceful Valley 17 8,552 ft
Dutch George 20 6,520 ft
Stove Prairie 9 6,068 ft
Kelly Flats 29 6,751 ft
Ansel Watrous 16 5,839 ft
Pinewood Reservoir 22 6,604 ft
Hermit Park Open Space None 8,313 ft
Mountain Park 54 6,678 ft
Lower Narrows 8 6,470 ft
Flatiron Reservoir None 5,483 ft
Kelly Dahl 46 8,615 ft
Ski Area Snowpack Air Temperature 5 Day Forecast
Ski Estes Park (Hidden Valley) 57" 27° 14.19"
Eldora Mountain Resort 26" 26° 14.44"
Echo Mountain Park 31" 22° 12.94"
River Run Streamflow Length Class
Steven's Gulch to Bridges Take Out 56.4cfs 12.0 Mi III- to IV+
Upper South Boulder Creek 11.0cfs None Mi V+
Tunnel 1 to Golden Whitewater Park 49.5cfs None Mi III- to III+
SSV - Confluence to Picnic Grounds 55.4cfs 5.0 Mi V to V+
Filter Plant 1.66cfs None Mi II to III+
Lower Boulder Canyon 50.8cfs None Mi IV- to V-
Upper Narrows 56.4cfs 0.5 Mi V- to V+
Gnar Section 141.0cfs 1.0 Mi V+
Idledale to Morrison 23.7cfs 3.0 Mi IV+ to V
October Hole 55.4cfs None Mi II
Lower Narrows 72.4cfs 0.5 Mi V- to V+
Upper South Boulder Creek 11.0cfs None Mi V+
Golden Whitewater Park 1.66cfs 0.75 Mi II+
Upper Clear Creek 49.5cfs 2.5 Mi IV- to IV+
Filter Plant 1.66cfs None Mi II to III+
Lower North Fork 72.4cfs 11.0 Mi III
NSV 55.4cfs 13.0 Mi V+
Main Section 46.8cfs 3.0 Mi IV+ to V
Rustic (Upper) 56.4cfs 20.0 Mi III to III+
Middle Narrows 56.4cfs 1.0 Mi IV to V-
Upper North Fork 69.7cfs 9.0 Mi IV+ to V-