Picking a section of river is the real decision, not picking a river name. The South Platte runs for miles through terrain that ranges from easy roadside access to a steep canyon requiring a hike, technical tailwater nymphing, and spooky fish that reject indicators. The Colorado River includes a meadow headwaters stretch in Rocky Mountain National Park, a float corridor through the middle canyon where wading is limited, and everything in between. Saying "I'm going to fish the South Platte" tells you almost nothing useful. This article will show you how to turn a river name into a real section-level decision before you leave the house.
Which Part of the River Should You Fish?
How to choose the right Colorado river section
A River Name Is Not a Fishing Plan
Here is a comparison that makes the point clearly. Take two sections of the same river, both on the South Platte.
Cheeseman Canyon is one of the most famous tailwater reaches in the country. The fish are real. The canyon is beautiful. But the accessibility is rated hard, the fishing is rated hard, and getting there requires a hike down steep canyon walls. Once you arrive, the water is clear and the fish are highly pressured. They are indicator-shy and split-shot-shy. The currents coming off large granite boulders create complex, multi-directional flows that demand precise, drag-free drifts. The fish respond to small flies. Fish in the 12-18 inch range are common, and bigger fish exist, but they do not give themselves away easily. This is a section that rewards experience and punishes guesswork.
Eleven Mile Canyon is also on the South Platte, just downstream. The accessibility is easy. You can drive in and fish from road-accessible pullouts. Fish counts are high – rainbows, browns, cutbows, and cutthroat are all present. Sight fishing opportunities exist throughout the section. It is still a tailwater, still a technical fishery, but the barrier to entry is completely different from Cheeseman. Same river. Completely different day.
Now move to the Colorado River and look at the Middle Section, commonly called the Pumphouse section. This is a large freestone river that runs from the Pumphouse put-in near Kremmling down toward Dotsero. The preferred method here is floating. The section has the most fish per mile of anywhere on the Colorado River, with browns and rainbows commonly in the 12-16 inch range and some trophy fish for anglers with the right oarsman. Wade access exists at designated public-land areas, but it is limited. If you show up with only wading boots and no boat or guide contact, you are fishing a fraction of what the section offers.
Three sections. Two rivers. Enormous variation in access, water type, required skill, and best tactics. The river name does not resolve any of that. The section choice does.
Define the Day Before Choosing a Section
Before you pick a section, define what the day actually looks like. These variables matter more than how famous a reach is.
How much time do you have? A section that requires a mile-long hike to access the good water is not a two-hour trip. Cheeseman Canyon is a full-day commitment. The Town Section of Clear Creek, on the other hand, is built for anglers with a short window. It is a small freestone, easy to access, and fishable with a dry-dropper rig. You can make a few good casts in each pocket, cover water, and find trout in under two hours.
Who is fishing? Skill level shapes section choice. A beginner or intermediate angler comfortable with nymphing but new to tailwater fishing should not pick Cheeseman Canyon as their introduction to that technique. The fish there require skills that most anglers spend years developing. The same angler would do better at Eleven Mile Canyon, the Dream Stream, or the Colorado River Upper Section, where the water is more forgiving and there is real fish density to work with.
What is the access situation? Some sections are roadside. Some require hikes. Some sections are primarily float water. The Colorado River Middle Section is float-preferred. Going without a boat or an experienced guide on that reach means wading a section designed to be drifted. You will catch fish, but you will not experience what that section actually offers.
What are current flows? Flow conditions govern which sections are fishable on a given day. Most Colorado river sections have documented low-flow and high-flow thresholds. The Colorado River Kawuneeche Headwaters, for example, has a gauge tied to USGS station 09010500, and the planning guidance for that section is direct: check current discharge, water temperature, and clarity before choosing access and presentation. That habit applies to every Colorado section. Flows that are too high blow out sight fishing and change which flies work. Flows that drop below a section's threshold can concentrate fish in ways that help you, or in ways that stress them.
What is the season? Not all sections fish year-round. The Kawuneeche Headwaters fishes summer through fall. Many tailwaters on the South Platte are year-round fisheries. The Colorado River Middle Section fishes spring through winter but peak conditions differ by month. Picking a section rated for spring through fall in January is a planning mistake.
The most common failure mode is skipping this step entirely. An angler hears about a famous section, drives two hours, arrives without checking flows, and finds either blown-out water or conditions that demand a technique they are not set up for. Define the day first. Then pick the section.
Compare Access Water Type Skill and Tactics
Once you know what the day looks like, the comparison becomes straightforward. Every Colorado river section can be evaluated across four dimensions.
Access difficulty. Sections are generally rated easy, medium, or hard. Easy access means you can park and step into the river or walk a short distance. Medium access typically requires some navigation or route-finding but is not physically demanding. Hard access means a real hike, canyon walls, or technical terrain. Clear Creek's Town Section is easy access – it is in town, with multiple entry points along the road. Cheeseman Canyon is hard. If you have a group with mixed fitness or a limited time window, hard-access sections are not realistic choices.
Water type. Freestone rivers move with the natural gradient of the land. Their flows change with snowmelt, rain, and season. Small freestone streams like Clear Creek's Town Section or the Colorado River Kawuneeche Headwaters call for a move-and-cover approach, dry-dropper rigs, and light tippet. Large freestone rivers like the Gunnison River Upper Section or the Colorado River Middle Section demand different tactics – the Gunnison's upper reach, for example, is large, easy to access, but the best technique there is streamers. That is not intuitive from just knowing it is a freestone river. Tailwaters are fed by reservoir releases, which stabilizes temperature and flow but concentrates certain hatches and creates fish behavior that differs from freestone water. Midge and BWO hatches dominate Colorado tailwaters. The fish see more pressure and more flies.
Skill and difficulty. A section rated hard is not just hard to reach. The fishing itself is hard. Cheeseman Canyon requires technical nymphing with no indicator, precise reads of cross-currents from granite structure, and small flies. The Gunnison River Upper Section is rated medium difficulty with easy access, but it is a large river and streamer fishing requires its own specific skills. Honest self-assessment here prevents wasted days.
Tactics and presentation types. Look at what a section's primary technique actually is. Sections rated for dries and nymphs are different days than sections rated for nymphs only. Float sections demand different gear setup than wade sections. A dry-dropper approach works well on small freestone water with attractor-style dries, while tailwater fishing on the South Platte calls for small, specific nymph patterns that match the midge and BWO cycles those fish key on. Matching your tactics to the section before you go is far more productive than arriving with whatever is tied on your rod from the last trip.
All rivers carry runs, riffles, and pools in a repeating sequence regardless of size. Understanding where fish hold in each water type is the foundation skill. But choosing the right section first means you arrive ready to apply that knowledge to the right conditions, not spend half the day adjusting to something you were not prepared for.
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A Colorado Section Choice Example
Here is a realistic scenario to walk through the decision sequence.
An intermediate angler is driving from Denver on a free Saturday. He is comfortable with nymphing and has fished Colorado tailwaters before, but has never done technical Cheeseman-style fishing. He wants to wade. He has about five hours.
First check: flows. He pulls up the USGS gauge data the night before. South Platte flows are in normal range across most of the system. Nothing is blown out.
Second check: access and hike requirement. He looks at Cheeseman Canyon. Hard accessibility, hike required, steep canyon walls. With five hours, getting down to the water, fishing, and getting back out is a stretch, and he has never done that hike. He crosses it off the list.
Third check: skill match. Cheeseman is also the most technical tailwater fishery on the South Platte, possibly in the country. Indicator-shy fish, cross-currents from granite structure, small flies, perfect drifts required. That is not a beginner's section, and it is not the right introduction to that style of fishing either. Even if he had time, the difficulty mismatch would likely result in a frustrating day rather than a productive one.
Better choice: Eleven Mile Canyon. Easy accessibility, high fish counts, same tailwater character but without the extreme difficulty rating. He can drive in, walk to the water quickly, and spend his five hours fishing instead of hiking. He is still nymphing a technical tailwater with midges and BWOs, which is what he came to do. He can sight fish in the clearer stretches. It is the right section for that day.
Now change one variable. The same angler has a friend with a drift boat and a guide who knows the float. The weekend is open. Suddenly the Colorado River Middle Section makes sense. Large freestone, float-preferred, the most fish per mile on the Colorado, trophy fish in the mix. You still need to know what you are doing on the oars – there are rapids that require someone experienced at the sticks – but with the right setup, this section opens up as a completely different experience from anything available on the South Platte.
The lesson is not that one section is better than the other. The lesson is that the right section depends entirely on what the day actually is. Change one variable – time, access, float vs. wade, skill level – and the right answer changes with it.
A Practical Section Selection Checklist
Before your next Colorado river trip, run through these six questions.
1. What is the access difficulty, and is there a hike involved? Easy, medium, and hard-access sections have real differences in time commitment and physical demand. Match the access to the group and the window you have.
2. Are you wading or floating? Some sections are primarily float water. The Colorado River Middle Section is float-preferred, with limited designated wade access on public land. Arriving without a boat means fishing a portion of a section designed to be drifted. Confirm your method fits the section before you go.
3. What is the water type – freestone or tailwater? Freestone rivers fish differently from tailwaters. Fly selection, leader setup, and presentation approach all change. Tailwaters like the South Platte sections demand small flies, precise drifts, and awareness of indicator pressure on the fish. Freestone rivers like the Gunnison Upper Section or the Roaring Fork Lower Section are more forgiving but have their own demands.
4. Does your best technique match the section? If the section is rated for nymphs only and you primarily throw dries, you can still adjust, but you should know that going in. If the primary technique is streamers and you are not set up for that, the mismatch will cost you fish. Check the section's best technique before you rig up.
5. Is the section fishable in your season? Some sections fish spring through fall only. Some are year-round. High-elevation sections like the Kawuneeche Headwaters open up in summer and close down in late fall. Do not plan a December trip to a section that fishes best from June through September.
6. What are current flows relative to the section's usable range? Every section with a gauge has usable flow thresholds. If flows are above the high-flow threshold for the section, conditions may be poor. Below the low-flow threshold, the fish may be stressed or concentrated in unproductive ways. Pull real-time USGS discharge data before you leave. It takes two minutes and saves a wasted drive.
If you want all of these variables in one place for Colorado rivers – access points, water type, difficulty ratings, real-time flow data, fishable seasons, and interactive maps – that is exactly what River Explorer Pro is built for. It covers Colorado rivers and sections with the planning context that turns a river name into a real fishing decision. You can use it from any phone, tablet, or computer, and it keeps your research organized so you can compare sections before you commit.
Recommended Reading
Two articles in this series will help you carry this thinking further.
If you are still working through which Colorado rivers belong on your list at all, A Famous River Is Not Always the Right River covers how reputation and the right fit are two different things – and how to identify the rivers that actually match your situation.
Once you have a section in mind, flow conditions become one of the most important variables in the decision. What Does That Streamflow Number Actually Mean? breaks down how to read USGS flow data in plain terms so you can actually use it before you go.
If you want to build the skills that make any of these sections more productive once you get there – reading water, presentation, fly selection, understanding the Three Pillars of a good day on the river – Trout University is the structured learning path that covers all of it at your own pace.