Colorado Fishing Report

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