---
title: "Blue River Below Green Mountain – October Report: BWOs & Technical Fall Fishing"
description: Clear, low flows and selective trout define the Blue below Green Mountain this October. BWOs and midges dominate; October Caddis at dusk. Full rigs, flies, and access breakdown.
image: https://risebeyondflyfishing.com/hubfs/Blue%20River%20-%20The%20Blue%20Rivers%20turquoise%20waters%20set%20against%20a%20mountainous%20horizon.png
---

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# Blue River Below Green Mountain – October Report: BWOs & Technical Fall Fishing

- October 1, 2025

![Tymothe Meskel](https://risebeyondflyfishing.com/hubfs/Untitled%20design%20(33).png)

[Tymothe Meskel](https://risebeyondflyfishing.com/blog/author/tymothe-meskel)

![Blue River Fly Fishing Report near Green Mountain Resevior](https://risebeyondflyfishing.com/hs-fs/hubfs/2025%20Spring%20River%20Report%20Banners%20Cards/Blue%20River%20Fly%20Fishing%20Report%20near%20Green%20Mountain%20Resevior.png?width=3200&height=2400&name=Blue%20River%20Fly%20Fishing%20Report%20near%20Green%20Mountain%20Resevior.png)

The Blue River below Green Mountain is sliding into its fall groove: **low, clear, and technical.** At ~low fall flows, wading is wide open, but trout are spooky and selective. Expect **Blue Winged Olive hatches** under cloud cover and the occasional **October Caddis** fluttering late. This tailwater demands finesse—think small emergers, long leaders, and stealth approaches.

---

## Conditions Summary

![rise beyond fly fihsing company in denver colorado a guide rating for a stream. Good is 5 trout. This rating is for 3 trout. So good or semi challenging fishing conditions.](https://risebeyondflyfishing.com/hs-fs/hubfs/Guide%20Ratings/Guide%20Rating%20(800%20x%20175%20px)%20(3).png?width=800&height=175&name=Guide%20Rating%20(800%20x%20175%20px)%20(3).png)

- **Flow Rate:** low autumn release (~variable, controlled tailwater)
- **Water Temp:** cool tailwater outflow — trout-friendly all day
- **Clarity:** clear, glassy — fish see everything
- **Best Times:** midday cloud cover (BWO hatches) and dusk (October Caddis)
- **Primary Hatch:** BWOs (#18–20), midges (#20–24), October Caddis (#12–14)
- **Crowds:** light-moderate — fewer anglers in cooler fall weeks
- **Confidence:** 60% — conditions steady but technical fishing
- **Star Rating:** ⭐⭐⭐ (solid, but technical and time-windowed)

[SILVERTHORNE WEATHER](https://forecast7.com/en/39d63n106d07/silverthorne/?unit=us)

---

### Listen to the Podcast!

Colorado\_Blue\_River\_Tailwater\_Secrets\_\_7X\_Tippet,\_Tiny\_Flies,\_a

14:57

 

 

## Hatch Chart – October at the Blue River (below Green Mountain)

Midges — ⭐⭐⭐⭐  
Blue Winged Olives — ⭐⭐⭐⭐  
October Caddis — ⭐⭐  
PMDs (stragglers) — ⭐

> Note: BWOs dominate when clouds settle in. October Caddis can provide some bigger dry opportunities at dusk, but expect picky trout.

 

### Blue River Hatch Chart

 

---

## ![head waters of the colorado river fly fishing location near winter park](https://risebeyondflyfishing.com/hs-fs/hubfs/head%20waters%20of%20the%20colorado%20river%20fly%20fishing%20location%20near%20winter%20park.png?width=1600&height=1600&name=head%20waters%20of%20the%20colorado%20river%20fly%20fishing%20location%20near%20winter%20park.png)

 

## Flies to Tie On

**Dries / Terrestrials**

- BWO Parachute (#18–20)
- October Caddis Adult (#12–14) — skate near banks
- Griffith’s Gnat (#20–22)

**Nymphs / Emergers**

- RS2 (gray/olive, #20–22)
- WD-40 (#20–22)
- Two-Bit Hooker (#18) — *Pro pick*
- Black Beauty (#22–24)

**Streamers**

- Slumpbuster (olive or black, #8–10)
- Thin Mint Bugger (#10)

 

---

## Tactical Playbook

- **Midday cloud cover:** single BWO dry on 6X; target slicks and tailouts.
- **All-day subsurface:** long leader, 6X–7X, RS2 or WD-40 on light weight.
- **Evening swing:** October Caddis skated or swung bugger across seams.
- **Streamer probe:** low-light hours, especially in deeper runs and canyon shade.
- **Rig Note:** 10–12 ft leaders, delicate presentation mandatory in this technical tailwater.

---

## Access & Flow Zones

- **Below the dam:** cold, consistent flows, technical sight-fishing.
- **Bridge pullouts:** mid-river runs and ledge pools.
- **Public tailwater stretches:** limited but productive; cover water slowly.
- **Downstream canyon runs:** deeper seams hold bigger browns in fall.

---

## 8 FAQs – Blue River Below Green Mountain

1. **Is wading safe at current flows?** Yes, flows are low and very wadeable.
2. **Best hatch right now?** BWOs under cloud cover, midges consistent all day.
3. **Any chance at dry-fly action?** Yes, BWOs midday and occasional October Caddis.
4. **Leader length?** 10–12 ft with 6X or 7X for nymphs.
5. **Best fly to start with?** RS2 or WD-40 in #20–22.
6. **Streamer game worth it?** Yes, especially evenings—slumpbusters and thin mints.
7. **Crowd factor?** Moderate—less pressure than Deckers or Dream Stream.
8. **Are fish spooky?** Extremely. Expect sight-fishing conditions—move carefully.

![Animas River (1600 x 900 px) (12)](https://risebeyondflyfishing.com/hs-fs/hubfs/Animas%20River%20(1600%20x%20900%20px)%20(12).png?width=800&height=450&name=Animas%20River%20(1600%20x%20900%20px)%20(12).png)

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