Colorado Fishing Report

Best Fishing Stream Name Today
1 Prewitt Reservoir, CO 5
2 Jackson Reservoir, CO 5
3 North Sterling Reservoir, CO 5
4 Flagler Reservoir, CO 5
5 Barr Lake, CO 4
6 Mariano Reservoir, CO 4
7 Home Supply Reservoir, CO 4
8 Lon Hagler Reservoir, CO 4
9 Douglas Reservoir, CO 4
10 Boyd Lake, CO 4
11 South Platte River: Lower, CO 4
12 Big Beaver Reservoir, CO 4
13 Dolores River, CO 3
14 Elk River, CO 3
15 Cherry Creek Lake, CO 3
16 Adobe Creek Reservoir, CO 3
17 Lake Hasty, CO 3
18 Watson Lake, CO 3
19 Chatfield Lake, CO 3
20 Horseshoe Lake Reservoir, CO 3
21 Trinidad Lake, CO 3
22 Ramah Reservoir, CO 3
23 Neeskah Reservoir: Kiowa, CO 3
24 R R Rutherford Reservoir, CO 3
25 Highline Lake, CO 3
26 Narraguinnep Reservoir, CO 3
27 Elk Head Reservoir, CO 3
28 Halligan Reservoir, CO 3
29 Pinewood Lake, CO 3
30 Sweitzer Lake, CO 3
31 Gunnison River: Upper, CO 3
32 Pastorius Reservoir, CO 3
33 Smith Reservoir, CO 3
34 Holbrook Reservoir, CO 3
35 Horse Creek Reservoir, CO 3
36 Lake Hasty: Bent, CO 3
37 John Martin Reservoir, CO 3
38 Brush Hollow Reservoir, CO 3
39 Pueblo Reservoir, CO 3
40 Martin Lake Reservoir, CO 3
41 Neenoshe Reservoir, CO 3
42 Thurston Reservoir, CO 3
43 Two Buttes Reservoir, CO 3
44 Bonny Reservoir, CO 3
45 Neeskah Reservoir, CO 3
46 Julesburg Reservoir, CO 3
47 Roaring Fork River, CO 3
48 Saint Vrain Creek, CO 3
49 Rio Blanco Lake, CO 3
50 West Dolores River, CO 2
51 Miramonte Reservoir, CO 2
52 Cache la Poudre River, CO 2
53 Boulder Creek, CO 2
54 Totten Lake, CO 2
55 Fryingpan River, CO 2
56 Grape Creek, CO 2
57 Cimarron River, CO 2
58 Los Pinos River, CO 2
59 Culebra Creek, CO 2
60 Bear River, CO 2
61 Big Blue Creek, CO 2
62 Fraser River, CO 2
63 Echo Canyon Reservoir, CO 2
64 Cebolla Creek, CO 2
65 Grand Lake, CO 2
66 Willow Creek Reservoir, CO 2
67 Lake Granby, CO 2
68 Rifle Gap Reservoir, CO 2
69 Henson Creek, CO 2
70 North Fork Big Thompson River, CO 2
71 Crawford Reservoir, CO 1
72 South Delaney Lake, CO 1
73 Dowdy Lake, CO 1
74 Shadow Mountain Lake, CO 1
75 Cowdrey Reservoir, CO 1
76 Grass Valley Reservoir, CO 1
77 Mountain Home Reservoir, CO 1
78 Haviland Lake, CO 1
79 Sylvan Lake, CO 1
80 Skagway Reservoir, CO 1
81 Ruedi Reservoir, CO 1
82 Upper Dome Reservoir, CO 1
83 Vega Reservoir, CO 1
84 Vallecito Reservoir, CO 1
85 McPhee Reservoir, CO 1
86 Yampa River, CO 1
87 Gunnison River: Lower, CO 1
88 Arkansas River: Lower, CO 1
89 Pearl Lake, CO 1
90 Buckeye Reservoir, CO 1
91 Williams Creek Reservoir, CO 1
92 Tarryall Reservoir, CO 1
93 Steamboat Lake, CO 1
94 Paonia Reservoir, CO 1
95 Deweese-Dye Reservoir, CO 1
96 East Delaney Lake, CO 1
97 Green Mountain Reservoir, CO 1
98 San Luis Lake, CO 1
99 Sanchez Reservoir, CO 1
100 Puett Reservoir, CO 1
101 Joe Moore Reservoir, CO 1
102 Summit Reservoir, CO 1
103 Jackson Gulch Reservoir, CO 1
104 Chambers Lake, CO 1
105 Sweetwater Lake, CO 1
106 Elevenmile Canyon Reservoir, CO 1
107 Spinney Mountain Reservoir, CO 1
108 Antero Reservoir, CO 1
109 Taylor River, CO 1
110 Groundhog Reservoir, CO 1
111 Big Meadows Reservoir, CO 1
112 North Michigan Creek Reservoir, CO 1
113 Lake John, CO 1
114 North Delaney Lake, CO 1
115 Dumont Lake, CO 1
116 Clear Creek, CO 1
117 Bear Creek, CO 1
118 Clear Creek Reservoir, CO 1
119 La Jara Reservoir, CO 1
120 Lemon Reservoir, CO 1
121 Rio Grande Reservoir, CO 1
122 Rito Hondo Reservoir, CO 1
123 Road Canyon Reservoir Number 1, CO 1
124 East River, CO 1
125 South Platte River: Upper, CO 0
126 Lost Lake Slough, CO 0
127 North Platte River, CO 0
128 Arkansas River: Upper, CO 0
129 Upper Stillwater Reservoir, CO 0
130 Mesa Lake, CO 0
131 Island Lake, CO 0
132 Big Creek Reservoir Number 1, CO 0
133 Roaring River, CO 0
134 Clear Creek: Arkansas River, CO 0
135 Conejos River, CO 0
136 Homestake Creek, CO 0
137 Fall River, CO 0
138 Deep Lake, CO 0
139 Dillon Reservoir, CO 0
140 Gunnison River: Black Canyon, CO 0
141 South Fork Rio Grande, CO 0
142 North Fork South Platte River, CO 0
143 Deep Ward Lake, CO 0
144 Clear Lake, CO 0
145 Cottonwood Lake, CO 0
146 Hot Springs Reservoir, CO 0
147 Shaw Lake, CO 0
148 Jefferson Lake, CO 0
149 Turquoise Lake, CO 0
150 Joe Wright Creek, CO 0
151 Michigan River, CO 0
152 Tarryall Creek, CO 0
153 Elk Creek, CO 0
154 Rio Grande, CO 0
155 Cochetopa Creek, CO 0
156 Rio San Antonio, CO 0
157 Trujillo Meadows Reservoir, CO 0
158 Middle Fork South Platte River, CO 0
159 White River, CO 0
160 South Fork White River, CO 0
161 Alberta Park Reservoir, CO 0
162 Gore Creek, CO 0
163 Colorado River: Lower, CO 0
164 Blue River, CO 0
165 Eagle River, CO 0
166 San Miguel River, CO 0
167 Uncompahgre River, CO 0
168 Animas River, CO 0
169 Crystal River, CO 0
170 Florida River, CO 0
171 Muddy Creek, CO 0
172 Piedra River, CO 0
173 Williams Fork, CO 0
174 San Juan River, CO 0
175 Colorado River: Upper, CO 0
176 Hermosa Creek, CO 0
177 Troutvale Reservoir Number 1: Hinsdale, CO 0
178 Troutvale Reservoir Number 2, CO 0
179 Lake Fork of the Gunnison, CO 0



What is Whacking Fatties? Fly fishing reports and forecasts for ~10,000 streams and lakes and rivers across North America and the United Kingdom.

What is the goal?

To better understand fly-fishing patterns, conditions to predict ferocity of fishable events and locations.

How do we do it?

Fly Fishing Reports and Forecasts. Throughout every day, we create 7 day fishing forecasts for ~10,000 streams and lakes.

What is the Fatty Factor?

A 5 star rating calculated per hour over every day per stream. We create a detailed forecast for each stream whereby every hour gets a 5 star Fatty Factor rating.

How is the Fatty Factor calculated?

The Fatty Factor is calculated using a fly-fishing success estimation model containing proprietary big data analytics. We consume data from near and real-time sources, satellites, and sensors; compile/compare, against historic datasets, to create the Fatty Factor. Location, season, and analytics improve the rating over time.

How is the Fatty Factor rated?

5 starts is the best while 0 starts is “Not Fatty”.

How to use Whacking Fatties Fishing Reports and Forecasts?

Consult the detailed stream information section of the fly-fishing reports and forecasts for the latest weather temperatures, wind speeds, cloud cover, gauge flows, and insect hatch patterns.

What do trout eat?

Check out the hatch recommendations for each stream in the detailed stream area. Investigate the hatch recommendations if you are interested in what do trout eat.

What kind of fish can I catch?

You tell us? Rainbow trout, brook trout, lake trout, bass, carp, etc. Currently, fresh water species. Salt water fly fishing? Fly fishing for carp is awesome. Tell us what you are after? Steelhead, grayling, tarpon, bass, bonefish, taimen, permit, salmon fishing?

How do I use the fishing maps?

We have a vast amount of geographic data for each stream. Click on the points to get more information. Green points represent fishing access such as put-ins and take-outs. Purple points represent bridges or stream crossings whereby often Google StreetView is available. Red points represent USGS Stream Gauges. Where available, we have graphs for Predictive Hydrograph 7 days, Water Temperature, Observed Height (ft.) 7 days, Observed Discharge (cfs) 7 days, and Duration Hydrograph. The Duration Hydrograph is a graphical presentation of recent daily streamflow, plotted over the long-term statistics of streamflow for each day of the year.

Can I determine land ownership from the stream map?

Yes. Landownership data is included in the map. In the map legend, the type of ownership is shown while you hover or tap on the map. You will see public or private land. For public, it will tell you the agency such as Forest Service or State Park.

Does Whacking Fatties have private landowner information such as parcel boundaries?

Currently, we have landowner information for Montana only. If you drill down into the map, you will see parcel boundaries. Simply click on the parcel to see who owns the land and other related information.

How do I determine distance from one access to another?

In the map, the measure tool can be used to trace along a stream to measure between fishing access points.

Can I determine stream elevation?

In the fishing map, you can turn on the elevation profile for a stream. You are able to visually see how much elevation is dropped along a stream.

What other mapping data is available and useful to anglers?

We provide three different background maps: dark, light, and satellite. The light is useful for planning routes to fishing access points. The satellite is very useful for all sorts of detailed planning.

What gauges are included in the Stream Flow graph?

For each stream, we have included all gauges for the stream overlaid into one graph. This is great for analyzing flow data of the stream as a whole to help predict best fishing areas.

What is the Fatty Store?

Check out the Fatty Store for great deals on the best fly fishing gear available in the market. We make available only the highest quality fly fishing gear at deep discounted prices such as fly fishing rods, fly boxes, waders or wading boots, fly fishing reels, flies, and tackle. From time to time, we have promotions on fly fishing vacations, film tours, and fly fishing videos. Look for deals on fly fishing schools.

What about fly fishing forums?

We have a great fly fishing forum where anglers can post their own reports and pictures. At each detailed stream page, you can upload fish pictures and your own fishing reports. We encourage you to rate the stream. We are working on the capability to upload your own fishing videos.

Where do I find a professional recommended fishing guide, lodge, or fishing charter?

Whacking Fatties Pro Contributors are professionally vetted and approved. Pro Contributors provide the highest quality guided fishing experiences. Look for recommended fishing charters, lodges, fly fishing and tackle shops posted on detailed stream report pages. Fishing near me? Investigate Pro Contributors listed on specific detailed streams near you.

What is Fatty Information?

What is the best fly line? How to tie a fly? Fly lines explained? Fly fishing beginner? Fatty Information is a new section whereby we present practical fly fisherman knowledge such as fly fishing knots, fly patterns, tapered leader formulas, tippet rings, strike indicators, drift boats, nymph fishing, euro nymphing, knots for fly fishing, best fishing sunglasses, etc. Information on our favorite flies such as mop files, clouser, nymph fly, wet flies, muddler minnow, isonychia fly, mole fly, cdc and elk fly, trico fly, caddis fly, and flies for largemouth bass. As well as recommendations for best small stream fly rods. The tug is the drug!

What are Fatty Alerts?

Never miss a great day of fishing! Fatty Alerts are automated email notifications whereby you are sent an email ONLY when your favorite streams have a great forecast. First, you sign up for a Whacking Fatties account; then, choose your favorite streams to get alerts. Fatty Alerts include our long range forecast. Never miss great fishing weather or fishing forecast with Fatty Alerts. They are free!

What are we working on next?

We will be expanding to fresh water lakes for bass, carp, and other great fishing. We will be able to assist with planning the best dates and times for your next fly fishing for stripers adventure. Forecasting for salt-water locations are on the radar. Please contact us with your feedback. Tight lines!

With the goal of better understanding fly-fishing patterns and predicting location and ferocity of fishable events, Whacking Fatties presents the Fatty Factor: a fly-fishing success estimation model using proprietary big data analytics.

Whacking Fatties promotes responsible fishing via catch and release practice and water resources conservation.

Check out more:

The Fatty List: Top Daily Fly Fishing Reports broken down by nationwide, northeast, south, midwest, and northwest fly fishing regions

The Fatty Map: Today's Top Fishing Streams on a Map

Top Professional Contributors

Fishing Report Feed - find current fishing reports and updates

Fatty Photo Feed