Blue Stream Fly Fishing
Fly Fishing Report for:

St. Vrain - Lyons - Colorado

Hatch Chart - Best Access/Spots - Local Fish - About

Water Flow Chart

Using Water Flow Charts & Weather Reports: Begin with our water flow charts to grasp stream velocity and volume – look for stable or rising trends to pinpoint ideal fishing times. Learn to interpret sudden spikes or drops, which can indicate potential challenges. Next, consult our weather reports to understand ambient conditions. Pairing the two, you can anticipate fish behavior, choose the right gear, and select the best fishing spots. Use these tools together for a holistic approach to your next fishing adventure.

In-Depth Weather

Directions To Location

Hatch Chart

Month Hatch Time of Day Recommended Fly Sizes Popular Fly Patterns
January Midges Afternoon 18-22 Zebra Midges, Griffith's Gnats
February Midges Afternoon 18-22 Midge Pupa, Black Beauties
March Midges, Blue Wing Olives Afternoon 18-22, 16-18 Rusty Spinner, Pheasant Tail
April Blue Wing Olives, Caddis Afternoon 16-18, 14-16 Elk Hair Caddis, Adams
May Caddis, Stoneflies, PMD All day 14-16, 8-12, 16-18 Elk Wing Caddis, Yellow Sally, PMD Comparadun
June PMD, Caddis, Stoneflies All Day 16-18, 14-16, 8-12 PMD Emerger, Stimulator, Green Drake
July Tricos, Caddis, Terrestrials Morning, Evening 20-22, 14-16, 10-12 Trico Parachute, Elk Hair Caddis, Ant Patterns
August Tricos, Terrestrials Morning, Afternoon 20-22, 10-12 Trico Spinner, Hopper Patterns
September Blue Wing Olives, Terrestrials Afternoon 16-18, 10-12 BWO Emerger, Beetle Patterns
October Blue Wing Olives, Midges Afternoon 16-18, 18-22 BWO Comparadun, Midge Larva
November Midges Afternoon 18-22 Disco Midge, Mercury Midge
December Midges Afternoon 18-22 Midge Pupa, Blood Midge

While we strive to ensure the precision of our hatch charts, some reflect broader river region insights. Through ongoing partnerships with local guides and fly shops, we’re committed to refining our data. Should you notice any inconsistencies or have feedback, we welcome you to reach out. 

Best Fishing Spots

The St. Vrain River in Lyons, Colorado, is an excellent location for fly fishing with a variety of optimal spots:

  • Button Rock Preserve: Frequently stocked with rainbow and brown trout, it’s an exquisite spot for avid fly fishermen.
  • Roger’s Park: This spot in downtown Lyons is known for its abundant trout population. Easy access to the water makes it a favourite among local anglers.
  • Apple Valley Bridge: Just north of Lyons, the deeper water here offers excellent opportunities for larger trout.
  • Hall Ranch: The river here spreads out, creating numerous pools and runs that hold a mix of brown and rainbow trout.
  • Sleepy Lion Trail: This path along the St. Vrain offers secluded fishing spots with stunning views of the surrounding landscape.

Best Access Points

If you’re enthusiastic about fly fishing and are heading to St. Vrain – Lyons, here are some of the top access points you should consider:

  1. Button Rock Preserve: This spot boasts of tranquil sights and a large variety of fish. One point of note is that it’s day use only, with no camping allowed.
  2. St. Vrain State Park: This state park provides a perfect balance between good fishing and family-friendly amenities.
  3. Roger’s Park: Centrally located in the town of Lyons, Roger’s Park offers easy access to the river, picnic areas, and even a children’s playground.
  4. Pella Crossing: This often overlooked natural area hosts abundant wildlife and excellent fly fishing opportunities.
  5. Lyons Riverside Park: This park in downtown Lyons provides ample access to the St. Vrain River as well as picnic spots and a bandshell for public concerts.
Make sure you follow all local regulations and respect the environment while you enjoy your fishing trip.

Local Fish

  • Trout: One of the most targeted fish in St. Vrain – Lyons, particularly the rainbow and brown variety.
  • Bluegill: These are often targeted by those fly fishing in St. Vrain – Lyons.
  • Smallmouth Bass: Often targeted for its reputation as a fighter, the bass in St. Vrain – Lyons don’t disappoint.
  • Largemouth Bass: A popular choice for many fly fishing enthusiasts in St Vrain – Lyons.
  • Pike: While not as commonly found as the other fish, some fly fishers target pike in St. Vrain – Lyons.
  • Green Sunfish: The beautiful scales of the Green Sunfish make them a favorite among fly fishermen in St. Vrain – Lyons.
  • White Bass: Not indigenous to the area, they’ve been stocked in St. Vrain – Lyons’s waters and are popular targets.
  • Northern Pike: Considered a challenging fish for fly fishers in St. Vrain – Lyons, it’s known for its ferocious fight when hooked.

About The River

The charming town of Lyons, nestled in the foothills of Colorado’s majestic Rocky Mountains, is named after its founder, Edward S. Lyon. Its history is closely tied to the majestic Saint Vrain River, named after a prominent trader, Ceran St. Vrain. In the late 1800s, this rugged area was transformed through the growth of the sandstone quarrying industry.

Here are the key points to know:

  • The town was founded in 1881 by Edward S. Lyon, who saw potential value the region’s rich sandstone deposits.
  • The St. Vrain River, flanked by expansive parks and wildlife, played a crucial role in shaping the town’s lively outdoor culture.
  • Lyons played a significant role in Colorado’s sandstone quarry industry, which was a vital part of construction in the late 19th and early 20th centuries. Even the town’s high school, Lyons Middle/Senior High, is constructed from this local stone!

In short, the intertwined histories of Lyons and the St. Vrain River are not only fascinating but also integral to the resilient spirit of this mountain town.


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