Wildlife

Beaver in Great Basin National Park

Wildlife
Beaver

Engineering marvel! These flat-tailed builders reshape waterways into fortress lodges with moving tunnels and underwater entrances. Spot them at dusk around park lakes and streams—stay back 25 yards and watch a nature masterclass in hydrology and construction unfold.

Quick facts

Scientific Name
Castor canadensis
Species Type
Mammal
Conservation Status
Common. Widespread across North America. Population stable and recovering from historical fur-trade declines.
Size Weight
40–70 lbs typically; up to 100 lbs in exceptional cases. Large for a rodent.

Species profile

Scientific Name
Castor canadensis
Species Type
Mammal
Conservation Status
Common. Widespread across North America. Population stable and recovering from historical fur-trade declines.
Size Weight
40–70 lbs typically; up to 100 lbs in exceptional cases. Large for a rodent.
Lifespan Wild
Typically 5–10 years in the wild.
Identifying Features
Large flat paddlelike tail, dense brown fur, prominent orange-yellow front teeth, stocky body, webbed hind feet. Up to 3-4 feet long including tail.

Where & when to look

Where To See
Water areas throughout the park: shorelines of Baker Lake, Johnson Lake, Stella Lake, Teresa Lake, along Lehman Creek, Snake Creek, and other perennial streams with riparian vegetation.
Best Viewing Times
One hour before sunset through two hours after dark is prime viewing. Early dawn (6–8 AM) is also productive.
Sighting Frequency
Possible but uncommon due to nocturnal behavior and limited water habitat in high-desert park. Dedicated evening visitors have reasonable chances at suitable water sites.
Habitat Description
Perennial streams and lakes with riparian vegetation. They select areas with suitable trees for felling and building materials. Great Basin's high-elevation waterways meet these needs.
Activity Pattern
Nocturnal and crepuscular. Most active from dusk through dawn. Rarely seen during daylight.
Migration Patterns
Non-migratory. Beavers establish territory and remain within home range (typically 2–3 miles of waterway). Dispersing juveniles may travel longer distances to find unoccupied habitat.
Hibernation Info
No hibernation. Active year-round. In winter, they access food stored beneath ice and remain in lodges. Pre-winter food caching is critical to survival.

Wildlife safety

Dangerous
0
Viewing Distance Required
25 yards minimum (per park regulations for non-predator wildlife). This allows safe observation while respecting their space and natural behavior.
Safety Precautions
Maintain 25-yard minimum distance. Never approach active lodges or dams—approach quietly to avoid startling them. Do not block their escape routes to water. Do not feed or attempt to hand-tame.
If Encountered
Beavers will avoid you. Back away slowly and quietly. Do not pursue or corner. If you observe one on land, move perpendicular to its path to water and allow it to escape. Retreat to safe distance (25 yards+) and observe from afar.
Never Feed Approach
1
Report Sightings
1
How To Report
Report sightings, injuries, or unusual beaver behavior at Great Basin Visitor Center or to any uniformed ranger. Phone: visit nps.gov/grba for current ranger contact information.

Photography & conservation

Best Photo Locations
Shorelines of Baker Lake, Johnson Lake, Stella Lake, and Teresa Lake at dusk or dawn. Snake Creek and Lehman Creek riparian zones where terrain permits safe observation.
Recommended Equipment
Binoculars (8x42 or better), telephoto camera lens (100–400 mm), red headlamp (to preserve night vision), waterproof notebook, field guide to identify dam and lodge structures.
Ethical Photography
Use telephoto lens (100–400 mm minimum). Never block beaver pathways to water. Do not disturb lodges or dams to get photos. Allow natural behavior to unfold. Never bait or create artificial conditions for viewing.
Conservation Threats
Habitat loss from dam building and water diversions, pollution in waterways, disease (e.g., giardia), and regional drought reducing water availability.
Protection Efforts
Great Basin protects riparian zones and perennial water sources. Park regulations prohibit harassment and ensure habitat connectivity.
How Visitors Help
Stay on trails to avoid trampling dam structures and riparian plants. Pack out all trash (pollution affects beaver health and water quality). Report injured or dead beavers to ranger. Do not feed or offer water. Keep dogs on leash.

Viewing advice

Best Time To Visit
Evening (dusk) to early morning (dawn) when they forage and work on lodge/dam maintenance.
Viewing Tips
  • Position yourself upwind and upstream if accessible.
  • Remain silent and motionless.
  • Look for V-shaped ripples radiating from moving beaver.
  • Watch for freshly cut branches or bark on trees—sign of active feeding.
  • Best odds at lakes and wider stream sections with slower water.
Tips Advice
  • Visit water areas at dusk with binoculars and patience.
  • Listen for tail-slaps on water (alarm signal) and plops as they enter.
  • Look for lodge mounds and dam structures—these mark active sites.
  • Scan shorelines for ripples and movement.
  • Stay downwind if possible.
  • Use red headlamp (preserves night vision and causes less disturbance).
Accessibility
Not accessible from roadside. Requires hiking to lakes and stream areas. Baker Creek area and Wheeler Peak Scenic Drive offer the most accessible water-view trailheads.
Family Friendly Notes
Beavers are perfectly safe for families. Children benefit from the lesson in nature's engineering and patience. Enforce the 25-yard rule and keep kids close. Quiet observation teaches discipline and respect.

More details

Lifespan Captivity
Up to 20 years in captivity.
Diet
Tree bark, branches, aquatic vegetation, and woody plants. Aspen and willow preferred; also cottonwood, birch, lodgepole pine.
Breeding Season
Mating occurs January–March (late winter). Kits born April–June; young remain in lodge through first year.
Nearby Facilities
Great Basin Visitor Center (Desert Shrub, Stop 1 on scenic drive). Baker is nearest town 5 miles away (ranger station, supplies). Visitor center can provide current sighting reports and stream-access recommendations.

Frequently asked questions

Will a beaver attack me?

No. Beavers are shy and will flee if approached. They bite only if cornered or protecting kits. Keep your 25-yard distance and you'll never have a problem.

When do I see beavers?

Dusk to dawn. They're nocturnal. One hour before sunset through two hours after dark is your best window. Early morning (6–8 AM) is also productive.

What do they eat?

Tree bark, branches, and aquatic plants. They prefer aspen and willow but also fell cottonwood, pine, and birch. Each beaver can fell dozens of trees per year.

Why do they build dams?

Dams create ponds that protect them from predators, provide underwater entrances to lodges, and allow them to cache winter food beneath the ice. Dams are engineering, shelter, and survival strategy combined.

Are they endangered?

No. North American beavers are common and stable. They recovered from historic fur-trade lows and are now widespread across the continent.

What if I find an injured or dead beaver?

Report it immediately to a ranger at Great Basin Visitor Center. Do not touch it. The park tracks health and population status.

Great Horned Owl

Silent night hunter! Owls catch rodents with pinpoint precision from dusk to dawn.

Mountain Lion

Silent hunter of the high country. Rare sighting, absolute respect required.

Mule Deer

Spot mule deer working the high country slopes! Keep 25 yards back and witness nature's herbivore perfectly adapted to Great Basin.

Peregrine Falcon

Speed demon raptor! Cliff nester, bird hunter, conservation legend. Keep 25 yards back!

Wild Turkey

Impressive upland birds with iridescent plumage and explosive displays!

Bald Eagle

The king of raptors returned from the brink. Spot bald eagles hunting over Great Basin's high-altitude lakes.

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Sources

  • YourNPGuide Editorial

Editorial review: YourNPGuide Editorial Team. Information is compiled from official sources, verified traveler reviews, and editorial research; no firsthand visit is implied unless explicitly documented. Learn how YourNPGuide works.

Last updated July 2026. Report an issue.