Few things beat a Colorado trail with your dog along — and Summit County and the surrounding national forests offer miles of dog-friendly hiking. The catch is that "dog-friendly" means different things on different land, and the high country asks more of a dog than a neighborhood walk. Here is where dogs are welcome, the rules to know, and how to keep your pup safe.
Dog-friendly hiking at a glance
| Where dogs are welcome | Most National Forest trails (leashed) — much of Summit County and the I-70 corridor |
|---|---|
| Where they are restricted | National parks (RMNP bans dogs on trails); some Wilderness and watershed areas |
| Leash | Required in many areas — and always smart around moose and wildlife |
| Top hazards | Moose, dehydration/altitude, sharp rock and hot pavement, foxtails, fast weather |
| Best season | Late June–September; avoid midday heat on rock, watch for ice in shoulder season |
Where dogs are welcome — and where they are not
The single most important thing is to check the land manager before you go:
- National Forests (welcome, usually leashed). The White River National Forest around Summit County — the trails near Breckenridge, Frisco, Dillon, and Silverthorne — generally welcomes leashed dogs. This is the bulk of the region's hiking.
- Designated Wilderness (varies). Dogs are usually allowed but must be under control or leashed; rules differ by wilderness, so check the specific area.
- National Parks (mostly banned). Rocky Mountain National Park prohibits dogs on all trails and in the backcountry — a common surprise. Dogs are limited to roads, parking areas, and campgrounds, leashed.
- Town and reservoir paths. The paved rec paths and many town open-space trails allow leashed dogs and are great for easy outings and acclimating.
Trail rules and etiquette
Leash laws exist for good reasons here — wildlife, other hikers, and your dog's own safety on cliffy or moose-heavy terrain. Even where voice control is allowed, a leash is the safe default. Pack out waste (bag it and carry it — do not leave bags on the trail), yield to other users, and keep your dog from chasing wildlife. Good trail manners keep trails open to dogs.
Keeping your dog safe up high
Altitude affects dogs too — a pup from lower elevation can tire quickly or even get altitude sick, so ease into big days and watch for heavy panting or lethargy (see our altitude guide). Carry plenty of water for both of you; do not count on streams, which dry up and can carry giardia. Watch the paws on sharp granite, talus, hot summer rock, and snow-and-ice, and check between the toes for cuts and foxtails at breaks. And give moose a very wide berth — they react aggressively to dogs and are the animal most likely to hurt you both.
Gear for hiking with your dog
A little gear goes a long way: a pack so your dog can carry its own water, boots for rough or hot ground, and a collapsible bowl for frequent water breaks. Our best dog hiking gear guide covers the in-stock packs, boots, and essentials we would bring, budget to premium.
Dog-friendly hiking FAQ
Where can I hike with my dog in Summit County?
Most trails in the surrounding White River National Forest — around Breckenridge, Frisco, Dillon, and Silverthorne — welcome leashed dogs, as do the paved reservoir rec paths. Always confirm the rules for the specific trailhead, and keep your dog leashed around wildlife.
Are dogs allowed in Rocky Mountain National Park?
No — RMNP prohibits dogs on all trails and in the backcountry. They are only allowed, leashed, in developed areas like roads, parking lots, picnic areas, and campgrounds. Plan a National Forest hike instead if you are bringing your dog.
Do I have to keep my dog on a leash on Colorado trails?
In many areas, yes — and even where voice control is permitted, a leash is the safe default. It protects wildlife (especially moose, which react aggressively to dogs), other hikers, and your dog on exposed terrain. Rules vary by land manager, so check before you go.
Can dogs get altitude sickness in Colorado?
Yes. A dog coming from low elevation can tire fast and show altitude sickness. Give them a day to adjust, start with shorter hikes, carry plenty of water, and watch for heavy panting, wobbliness, or lethargy — descend if you see warning signs. See our altitude guide.
What gear does my dog need for hiking here?
The essentials are a way to carry water (a dog pack and a collapsible bowl) and paw protection (boots) for sharp rock, hot summer ground, and ice. Our dog hiking gear guide lists in-stock picks from budget to premium.