Fishing Report: South Platte River Above Spinney Mountain Reservoir

The Middle Fork of the South Platte River, located below Montgomery Reservoir in Colorado, is a prime destination for fly fishing enthusiasts. This section of the river is known for its scenic beauty, diverse fish species, and a variety of fishing spots ranging from serene meadows to rocky, challenging terrains. The river flows through several state wildlife areas, making it accessible and popular for both novice and experienced anglers.

Fishing Report: Middle Fork of the South Platte River

The Middle Fork is showcasing its November charm, with crisp mornings, clear waters, and a slower flow. The trout are deep and deliberate, feeding primarily on midges and a few lingering BWOs. Expect action to pick up late morning when the sun warms the water just enough to spark some interest in those smaller flies. The scenery is as rewarding as the fishing itself, with mountain vistas and quiet, pristine stretches of river.

Fishing this time of year requires a patient approach and an eye for detail. A light tippet and gentle presentation are your allies, and timing is everything. The best hours fall between late morning and mid-afternoon, when fish are more active in the warming waters.

Conditions Summary

• Flow Rate: 75-100 CFS
• Water Temperature: 42-48°F
• Clarity: Clear
• Best Times: Late morning to mid-afternoon

River Flow Chart

source: Colorado Divison of Resources Station Flow Repor

Middle Fork of the South Platte Hatch Chart

Top 3 Flies for the Week

• Dry Fly: Blue Wing Olive, Size 20 – Use during midday when the sun warms the water.
• Nymph: Black Beauty, Size 22 – Perfect for drifting in deeper pools and slow-moving sections.
• Streamer: Mini Leech, Size 10 – Effective in shaded pockets or deeper sections during early morning or late afternoon.

Tips for Fly Fishing on the Middle Fork of the South Platte

• Seasonal Tip: With the lower flows and crystal-clear water, a stealthy approach is key. Keep a low profile and use lighter tippets (6X or 7X).

• Dry Fly: BWOs are your best option when the sun is high. Drift carefully and aim for a drag-free presentation for better success.

• Nymphing: Midges and small Baetis nymphs are effective. Focus on deeper pools and riffles where trout hold and feed at this time of year.

• Streamer Fishing: Smaller streamers work best in clear water. Retrieve slowly in deeper sections to provoke trout holding near structure.

Access Points

Tomahawk State Wildlife Area

• Location: Near the town of Fairplay, CO, along County Road 9 (Hwy 9)
• Description: The Tomahawk State Wildlife Area offers nearly two miles of public access to the Middle Fork of the South Platte. This area features slower, wider sections of the river, perfect for beginner anglers or those looking to fish in a more relaxed setting. The terrain includes open meadows and a mix of riffles and deeper pools, ideal for dry fly fishing and nymphing.
• Access Tips: There are designated parking areas along County Road 9. Follow the signs to the wildlife area. Be sure to follow all posted rules and regulations regarding fishing and public use, as this area is managed by Colorado Parks and Wildlife​(

Badger Basin State Wildlife Area

• Location: Off of County Road 77 (Tarryall Road), near Hartsel, CO
• Description: This public access area provides several miles of fishable water along the Middle Fork. Badger Basin is a great spot for those looking for a more remote experience with less fishing pressure. The river here is narrower, with more riffles and pools, making it ideal for both dry fly fishing and nymphing.
• Access Tips: Parking is available in designated spots along County Road 77. Be prepared for a short walk to the river. Ensure you have the appropriate permits, and be aware of any specific fishing regulations or catch-and-release rules that apply to this area​(

Hartsel Springs Ranch

• Location: Near the town of Hartsel, CO, accessible from US Highway 24
• Description: Hartsel Springs Ranch offers both public and private access to the Middle Fork. This section is known for its trophy-sized rainbow trout and provides tailwater and freestone fishing opportunities. The ranch offers a mix of deeper pools, fast runs, and slower meadow sections, making it suitable for various fly fishing techniques.
• Access Tips: While some sections are open to the public, private areas also require permission or a fee to fish. It's best to check with local guides or the ranch management for specific access details. This area can be very productive, especially during hatches and low-light conditions​(

Spinney Mountain State Park

• Location: Located downstream of Spinney Mountain Reservoir, near Hartsel, CO
• Description: Although Spinney Mountain State Park is better known for its reservoir fishing, the tailwater section of the Middle Fork that flows out of the reservoir provides excellent fishing opportunities. This area is characterized by deeper runs and riffles, with cold, clear water supporting a healthy trout population, including rainbows, browns, and cutthroats.
• Access Tips: Park at designated parking areas near the dam or along the access road leading into the park. Be prepared for a short hike to reach the best fishing spots downstream from the reservoir. Make sure to have a valid state park pass or day-use permit​

Eleven Mile Reservoir Area

• Location: Near Lake George, CO, accessible via County Road 92
• Description: The Eleven Mile Reservoir area offers access to the Middle Fork below the reservoir dam. This stretch of the river is known for its big fish, including cutbows and browns. The river below the dam is a tailwater fishery, which maintains consistent water temperatures and flow, creating excellent conditions for trout fishing year-round.
• Access Tips: Enter through the main gate of Eleven Mile State Park and follow the signs to the tailwater section. The area can get crowded, especially during peak seasons, so arriving early is best to secure a good spot. Always check the local fishing regulations and carry the appropriate permits​