Why Fall is Prime Time for Fly Fishing
Fall is arguably the most rewarding season for fly fishing in Colorado. As temperatures drop and leaves change color, the rivers come alive with active trout preparing for winter. The cooler water temperatures trigger aggressive feeding behavior, making this the perfect time to experience exceptional fishing.
Understanding Fall Feeding Patterns
During fall, trout enter a hyperphagic feeding phase, consuming as much food as possible before winter. This biological imperative means fish are less selective and more willing to strike at a variety of presentations. You'll often find multiple trout competing for the same food source, creating exciting opportunities for anglers.
Best Times to Fish in Fall
Unlike summer fishing, fall offers more flexibility in your fishing schedule:
- Mid-morning to early afternoon – Water temperatures are optimal for trout activity
- Overcast days – Cloud cover encourages fish to feed throughout the day
- Before weather fronts – Barometric pressure changes trigger intense feeding
Essential Fall Fly Patterns
Your fly box should include these autumn essentials:
Dry Flies
- Blue-Winged Olives (#18-22) – The most reliable fall hatch
- October Caddis (#10-14) – Large, active insects that bring up big fish
- Midges (#20-24) – Effective during cooler days
Nymphs and Streamers
- Pheasant Tail (#16-20) – A versatile all-season pattern
- Copper John (#16-18) – Effective in faster water
- Woolly Buggers (#6-10) – Perfect for aggressive fall browns
- Sculpins and streamers – Target larger predatory trout
Techniques for Fall Success
Nymphing Strategies
Fall typically requires deeper presentations as fish hold in slower, deeper pools. Use a two-fly nymph rig with a heavier point fly and lighter dropper. Adjust your indicator position to achieve a dead drift near the bottom where fish are holding.
Dry Fly Tactics
Blue-Winged Olive hatches often occur during the warmest part of the day. Watch for rising fish and match your fly size to the naturals on the water. A 5X or 6X tippet is essential for these smaller presentations.
"Fall is when experience really pays off. The fish are there, feeding heavily, but you need to present your flies with precision. Match the hatch, get your depth right, and you'll have the best fishing of the year." – Lia Barskey
Location Selection
Not all water fishes equally in fall. Focus your efforts on:
- Deeper pools and runs – Trout seek stable water temperatures
- Tailwaters – Consistent flows and temperatures extend the season
- Spring creeks – Reliable hatches continue through fall
- Main river channels – Brown trout migrate upstream for spawning
Weather Considerations
Fall weather can be unpredictable in Colorado. Layer your clothing, bring rain gear, and be prepared for temperature swings of 30-40 degrees in a single day. Morning frost is common, but conditions often warm nicely by midday.
Reading Fall Conditions
Pay attention to these environmental factors:
- Water temperature – Optimal feeding occurs between 45-55°F
- Clarity – Clear water requires longer leaders and smaller flies
- Flow rates – Stable flows are ideal; avoid fishing after heavy runoff
Conservation in Fall
Many trout species spawn in fall, particularly brown trout. Practice these conservation measures:
- Avoid fishing over spawning beds (redds)
- Handle fish gently and minimize fight time
- Use barbless hooks for easier releases
- Keep fish in the water during photos
Fall fly fishing in Colorado offers unmatched opportunities for anglers willing to adapt their techniques. With the right approach, you'll experience some of the most productive fishing of the year while enjoying the spectacular autumn scenery our rivers provide.