Ice fishing is one of the more approachable ways to spend a Colorado winter day on the water. You do not need a boat or fancy casting skills — drill a hole, drop a jig, and wait, ideally with friends and a warm shelter. The catch (so to speak) is that you are standing on frozen water, so knowing the ice is the single most important skill. Here is how to get started safely.
Ice fishing in Colorado at a glance
| Top waters | Dillon Reservoir, Lake Granby, and the South Park reservoirs (Antero, Eleven Mile, Spinney) |
|---|---|
| Target fish | Rainbow, brown & lake trout, kokanee salmon, northern pike, yellow perch |
| Season | Roughly December–March, once the ice is safe — conditions vary by lake and year |
| License | A Colorado fishing license (CPW) is required, same as open-water fishing |
| Golden rule | Never venture onto ice under about 4 inches of clear, solid ice — check as you go |
Where to go in and around Summit County
Dillon Reservoir, ringed by Frisco, Dillon, and Silverthorne, is the marquee spot up high — a big, scenic reservoir with trout and kokanee salmon, though its elevation and wind demand real cold-weather preparation. Over the passes, Lake Granby in Grand County is a famed lake-trout and kokanee fishery, and the South Park reservoirs (Antero, Eleven Mile, Spinney) are legendary trout waters within a couple hours of Denver. Always confirm current ice conditions locally before you go — they change fast.
Ice safety comes first
No fish is worth falling through. General guidelines (for new, clear, solid ice — not slushy or white ice, which is weaker):
- Under 4 inches: stay off.
- 4 inches: generally considered a minimum for walking and fishing on foot.
- 5–7 inches: for snowmobiles or ATVs.
- 8–12+ inches: for a small car or truck (many anglers never drive on ice, and mountain reservoirs are riskier than they look).
Check thickness with a spud bar or auger as you move out, avoid inlets, outlets, and pressure ridges where ice is thinner, never go alone, tell someone your plan, and carry ice picks and a throw rope. Early and late season are the most dangerous. When in doubt, don’t.
What you need
The basics: an auger to drill through the ice, a short ice-fishing rod and jigs, a sled to haul gear, and traction cleats for the slick walk out. A pop-up shelter and a heater make a cold day far more pleasant. Staying warm is critical at these elevations — layer up with merino base layers, warm gloves, and insulated snow boots, and don’t forget eye protection against the glare off the ice and snow. Layer up and bring the safety essentials — many of our gear guides carry over to a day on the ice.
License & regulations
You need a valid Colorado Parks & Wildlife fishing license to ice fish, and standard bag and possession limits apply (they vary by water and species, so check the current CPW regulations for your lake). Some reservoirs have specific rules on shelters, holes, and vehicles.
Colorado ice fishing FAQ
Is ice fishing safe in Colorado?
It can be, with caution. Never go onto ice under about 4 inches of clear, solid ice; 4 inches is a common minimum for walking. Check thickness as you go with a spud bar or auger, avoid inlets, outlets, and pressure ridges, never go alone, and carry ice picks and a rope. Mountain reservoirs and early/late season are the riskiest — when in doubt, stay off.
Where can I ice fish near Summit County?
Dillon Reservoir — ringed by Frisco, Dillon, and Silverthorne — is the main high-country spot for trout and kokanee, though its elevation and wind demand serious cold-weather prep. Lake Granby and the South Park reservoirs (Antero, Eleven Mile, Spinney) are other renowned options within a drive.
What fish can you catch ice fishing in Colorado?
Depending on the water: rainbow, brown, and lake trout, kokanee salmon, northern pike, and yellow perch are the most common targets.
Do I need a license to ice fish in Colorado?
Yes — a Colorado Parks & Wildlife fishing license is required, the same as open-water fishing, and standard bag and possession limits apply. Check the current CPW regulations for your specific lake.
What gear do I need to start ice fishing?
An auger to drill holes, a short ice rod with jigs, a sled to haul gear, traction cleats for the walk, and warm layers — a pop-up shelter and heater make it much more comfortable. Dress for serious cold with base layers, gloves, and snow boots.