Colorado Fishing Report

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