Colorado Fishing Report

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