Whacking Fatties Fly Fishing Reports and Forecasts

Colorado Fishing Report

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

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