Mountain Cottontail

Sylvilagus nuttallii

Also known as: Nuttall’s Cottontail

LCLeast Concern

The mountain cottontail is a small western rabbit shaped by dry shrublands, open woods, and cold interior basins. Unlike a hare, it relies on short bursts toward nearby cover rather than long-distance speed. Records below show how closely its national footprint follows the Great Basin and Rocky Mountain West, and reveal when observations rise through the year and which elevations provide suitable shelter and forage.

Range through the year

Where Mountain Cottontail is seen

Mountain Cottontail is recorded in 15 US states from 2,616 occurrence records, most heavily in Colorado (579 records) and Utah (418).

Current range2,616 records · 15 states
AlabamaArizona · 22 records · view state pageArkansasCalifornia · 189 records · view state pageColorado · 579 records · view state pageConnecticutDelawareDistrict of ColumbiaFloridaGeorgiaIdaho · 332 records · view state pageIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontana · 340 records · view state pageNebraska · 1 recordsNevada · 105 records · view state pageNew HampshireNew JerseyNew Mexico · 47 records · view state pageNew YorkNorth CarolinaNorth Dakota · 6 recordsOhioOklahomaOregon · 355 records · view state pagePennsylvaniaRhode IslandSouth CarolinaSouth Dakota · 18 records · view state pageTennesseeTexas · 3 recordsUtah · 418 records · view state pageVermontVirginiaWashington · 77 records · view state pageWest VirginiaWisconsinWyoming · 124 records · view state pageAlaskaAKHawaiiHIPuerto RicoPR
Occurrence data by state and month
Mountain Cottontail – occurrence records by US state and month (2,616 total across 15 states)
StateJanFebMarAprMayJunJulAugSepOctNovDecYear
Colorado4123285565661005842532820579
Utah12134155636351423723108418
Oregon4102331687044252614832355
Montana1315163570585332209910340
Idaho16181645493841274520116332
California7651019313737121546189
Wyoming871082019111311593124
Nevada524914192193856105
Washington25616111358324277
New Mexico···2512106541247
Arizona1112234413··22
South Dakota21·16131111·18
North Dakota······32···16
Texas·····3······3
Nebraska····1·······1

Based on 5,298 georeferenced US records, 2000-2026. Shading is observation density (where people record sightings), not true abundance. Alaska, Hawaii & Puerto Rico shown as insets.

Explore by state

Mountain Cottontail across 12 states

Occurrence records, conservation status, and the places it turns up, state by state. Open a state for detail, or visit its full page.

  • ColoradoNativeCommon1,013 records

    State rankSecure

    Notable placesRocky Mountain National Park · Roosevelt National Forest · Black Canyon of the Gunnison National Park · White River National Forest

    Countiesrecorded in 12

    Year-round in Colorado, with recorded sightings peaking in June–August.

  • UtahNativeCommon823 records

    State rankSecure

    Notable placesAntelope Island State Park · Uinta National Forest · Wasatch National Forest · Golden Spike National Historical Park

    Countiesrecorded in 12

    Year-round in Utah, with recorded sightings peaking in April–August.

  • OregonNativeCommon732 records

    State rankApparently Secure

    Notable placesDeschutes National Forest · John Day Fossil Beds National Monument · Crooked River National Grassland · Tumalo State Park

    Countiesrecorded in 12

    Year-round in Oregon, with recorded sightings peaking in May–July.

  • IdahoNativeCommon522 records

    State rankApparently Secure

    Notable placesLucky Peak State Park · Snake River Plain · City of Rocks National Reserve · Land of Yankee Fork State Park

    Countiesrecorded in 12

    Year-round in Idaho, with recorded sightings peaking in April–July, with a smaller rise in September–October.

  • MontanaNativeCommon453 records

    State rankSecure

    Notable placesGallatin National Forest · Bannack State Park · Montana State Trust Lands · Cherry River Fishing Access Site

    Countiesrecorded in 12

    Year-round in Montana, with recorded sightings peaking in May–July.

  • New MexicoNativeRare442 records

    State rankApparently Secure

    Notable placesState Trust Land · Valles Caldera National Preserve · Santa Fe National Forest · Organ Mountains - Desert Peaks National Monument

    Countiesrecorded in 12

    Year-round in New Mexico, with recorded sightings peaking in June, with a smaller rise in January.

  • CaliforniaNativeOccasional369 records

    State rankUnranked

    Notable placesLake Tahoe · Inyo National Forest · Tahoe National Forest · Eldorado National Forest

    Countiesrecorded in 13

    Year-round in California, with recorded sightings peaking in May–August, with a smaller rise in October.

  • NevadaNativeOccasional295 records

    State rankSecure

    Notable placesToiyabe National Forest · Great Basin National Park · Basin and Range National Monument · Humboldt National Forest

    Countiesrecorded in 12

    Year-round in Nevada, with recorded sightings peaking in June–July.

  • WashingtonNativeOccasional262 records

    State rankSecure

    Notable placesGinkgo Petrified Forest · Columbia River Gorge National Scenic Area · Gifford Pinchot National Forest · Washington State Department of Natural Resources (WADNR) State Resource Management Area

    Countiesrecorded in 12

    Year-round in Washington, with recorded sightings peaking in April–June, with a smaller rise in October.

  • WyomingNativeCommon261 records

    State rankSecure

    Notable placesYellowstone National Park · Devils Tower National Monument · State Lands 1111111932

    Countiesrecorded in 12

    Year-round in Wyoming, with recorded sightings peaking in February, with a smaller rise in June–July.

  • ArizonaNativeOccasional63 records

    State rankVulnerable

    Notable placesGrand Canyon National Park · Mount Baldy Wilderness · Sitgreaves National Forest · Petrified Forest National Park

    Countiesrecorded in 6

    Year-round in Arizona, with recorded sightings peaking in June–July.

  • South DakotaNativeOccasional57 records

    State rankApparently Secure

    Notable placesBadlands National Park · Wind Cave National Park · Custer State Park · Black Elk Wilderness

    Countiesrecorded in 6

    Year-round in South Dakota, with recorded sightings peaking in July–August, with a smaller rise in March and May.

IUCN Red List status

  1. LC
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX

LC – Least Concern

Widespread and abundant; not at risk.

SizeMountain Cottontail beside a 1.8 m adult, drawn to scale
Created by potrace 1.16, written by Peter Selinger 2001-2019 Created by potrace 1.16, written by Peter Selinger 2001-2019
Body length
28–38 cm11 in–15 in
Weight
0.6–1.1 kg1.3–2 lb

Silhouettes drawn to scale against a 1.8 m5 ft 11 in adult.

Elevation

From 200 georeferenced records, the Mountain Cottontail is recorded from 106 m348 ft to 3,368 m11,050 ft, with half of sightings below 1,552 m5,092 ft.

Each band shows the share of georeferenced sightings that fall within it. Records cluster where people live and hike, so low, populated elevations are over-represented. Read this as observation density, not true abundance.

Observation peakJuly3,429 records

Seasonality from research-grade observation dates across the US (3,429 records, all years). Reflects when the species is recorded, not a guarantee of presence.

Daily activity clockCathemeral– active in irregular bursts, day and night

1,376 mountain cottontail observations logged by hour of day. Activity is cathemeral (active in irregular bursts, day and night), peaking around 4 PM.

12 AM: 9 observations1 AM: 4 observations2 AM: 13 observations3 AM: 5 observations4 AM: 5 observations5 AM: 13 observations6 AM: 61 observations7 AM: 111 observations8 AM: 121 observations9 AM: 117 observations10 AM: 83 observations11 AM: 53 observations12 PM: 41 observations1 PM: 36 observations2 PM: 42 observations3 PM: 89 observations4 PM: 126 observations5 PM: 122 observations6 PM: 104 observations7 PM: 93 observations8 PM: 77 observations9 PM: 30 observations10 PM: 12 observations11 PM: 9 observations12 AM6 AM12 PM6 PM

Based on 1,376 records (all years). Reflects when people record sightings, not only when the animal is active.

Hourly observation counts: 12 AM 9, 1 AM 4, 2 AM 13, 3 AM 5, 4 AM 5, 5 AM 13, 6 AM 61, 7 AM 111, 8 AM 121, 9 AM 117, 10 AM 83, 11 AM 53, 12 PM 41, 1 PM 36, 2 PM 42, 3 PM 89, 4 PM 126, 5 PM 122, 6 PM 104, 7 PM 93, 8 PM 77, 9 PM 30, 10 PM 12, 11 PM 9.

Best encounter

Where and when to see a Mountain Cottontail

Your best chance: Colorado, in July, during the day.

Where
ColoradoCO
When
July
Time
During the daycathemeral
Trophic relationshipsFood web What a Mountain Cottontail eats, and what eats it.
Eaten by5
Western RattlesnakeCrotalus viridisRed-tailed HawkButeo jamaicensisGopher SnakePituophis cateniferAmerican BadgerTaxidea taxusCoyoteCanis latrans
This speciesMountain Cottontail

Grazes on plants

Eats

A sample of documented feeding relationships, filtered to species that also occur in the US. Diet and predators vary by region and season, and this is not a complete list, many animals eat, and are eaten by, more than what has been formally recorded here.

Life history

The Mountain Cottontail (0.6–1.1 kg1.3–2.4 lb) is a herbivore that first breeds around 0.3 years, carries a 30-day gestation, and bears about 3.6 young per litter. Maximum recorded longevity is 7.4 years.

Life cycle

  1. Gestation30 days
  2. Birthlitter of 3.6 young
  3. Sexual maturity0.3 yr (female)
  4. Typical lifespan7.4 years
  5. Maximum recorded longevity7.4 years

Reproduction

Gestation
30days
Litter size
3.6youngaverage
Litters / year
3.5litters
Age at first breeding
0.3years

Diet composition

Herbivore

By foraging composition: 100% plant material.

  • Plant material100%

Most active at dawn and dusk and at night.

Typical values for the species, not local measurements. Maximum longevity is the longest lifespan on record; most individuals live far less.

Commonly confused with

Animals people sometimes mistake for the mountain cottontail, and how to tell them apart.

A Compact Rabbit Of The Interior West

It isn’t a rabbit of dense eastern woods or open low desert.

The mountain cottontail is a western rabbit of the Great Basin and Rocky Mountain region, with a U.S. range spread across roughly thirteen states from the interior Northwest and northern Rockies south through parts of the Great Basin and high Southwest. It is not a broad eastern cottontail and not a desert jackrabbit. The usual impression is compact and low, with a rounded body, relatively short ears, gray-brown fur, and a small white tail that flashes when the animal bounds into cover.

Identification often comes down to place and proportions. Mountain cottontails are smaller and shorter-eared than black-tailed jackrabbits, and they lack the jackrabbit’s tall, long-legged stance. Compared with desert cottontails, they often look colder gray and more compact, especially in rocky, sagebrush, foothill, or montane settings. A crouched mountain cottontail can appear almost round, with the ears held upright but not towering above the body.

Mountain cottontail in dry grass and open pine woodland
Shorter ears and a compact body help separate mountain cottontails from jackrabbits in the same western landscapes. Photo: Millie Basden, CC BY 4.0.

Great Basin And Rocky Mountain Edges

This rabbit is most at home in the interior West. Sagebrush flats, bunchgrass openings, rocky foothills, open conifer woodland, mountain meadows, brushy draws, and shrub-covered slopes can all support it when food and escape cover are close together. It is often tied to broken habitat rather than uniform open ground. Low shrubs, rocks, logs, grasses, and uneven terrain give it places to freeze, feed, and flee.

In the southern part of its U.S. range, mountain cottontail records tend to be more local and elevation-linked. In the northern Rockies and Great Basin, it can be a familiar rabbit of sagebrush, foothills, and mountain valleys. It may also appear around rural yards, park edges, trailheads, and campgrounds if cover is nearby, but it is still a western upland and basin species at heart.

The range is broad enough that no single landscape captures it all. A rabbit in open Wyoming sage, a rabbit in a Colorado foothill draw, and a rabbit along a dry Oregon woodland edge may all fit the species. What ties those places together is not lush forest or bare desert, but a western mosaic of low plants, broken cover, and nearby escape routes.

Feeding Close To Cover

Mountain cottontails feed on grasses, forbs, leaves, bark, twigs, and seasonal green growth. In warm months they use fresh herbaceous plants where available. In colder or drier seasons, woody stems and tougher vegetation become more important. Like other rabbits, they often feed during dim light, but they can be seen by day when conditions are quiet or cover is close.

The animal’s first defense is stillness. A crouched cottontail can disappear against gray soil, dry grass, or sage stems. If approached too closely, it bolts in a quick, low run toward brush, rocks, burrows, or another patch of cover. That movement is very different from a jackrabbit’s long, high, open-country bounds.

Mountain cottontail resting near sparse western cover
Mountain cottontails use low vegetation, rocks, and shadowed edges rather than relying on long open sprints. Photo: Pam Hardy, CC BY 4.0.

Nesting And Young

Breeding varies with elevation, latitude, and weather. Females make shallow nests lined with plant material and fur, usually hidden in grass or low cover. Young rabbits are born small and helpless, then grow quickly under the pressure of a landscape filled with hawks, owls, foxes, coyotes, snakes, bobcats, and weasels.

Predation shapes nearly every part of mountain cottontail behavior. Feeding bouts are broken by pauses to listen and scan. Resting sites are chosen for concealment. Even in towns or campgrounds, individuals stay close to vegetation, rocks, walls, or other cover that can break a predator’s line of attack.

Sorting Cottontails From Jackrabbits

In the West, not every long-eared mammal is a cottontail. Black-tailed jackrabbits are hares, not rabbits, and their size makes them stand out once seen well. They have very long ears with black tips, long legs, a lean body, and a strong open-country gait. Mountain cottontails are smaller, rounder, and shorter-eared, with a white puff of a tail and a habit of diving into cover.

Desert cottontails are a more subtle comparison because they are true cottontails and can overlap in parts of the West. Habitat, ear length, body shape, and local range all matter. A compact gray rabbit in sagebrush, foothills, or mountain woodland within the Great Basin or Rockies is a good mountain cottontail candidate. A warmer, longer-eared rabbit in low desert scrub is more likely desert cottontail.

Photos can make the decision harder because a crouched rabbit compresses its body and can hide the tail. When possible, compare the animal with its surroundings. Short vegetation, rocks, sagebrush, and conifer-edge openings in the interior West support mountain cottontail. Open hot desert, washes with creosote or cactus, and a taller-eared profile lean toward desert cottontail.

Data & sources

The data and visualizations on this page draw on these open sources:

  • GBIFCC-BY 4.0occurrence records behind the range map, elevation, and record counts
  • iNaturalistCC0 / CC-BY / CC-BY-SAobservations, photos, and audio recordings
  • PhyloPicCC0 / CC-BY per itemthe to-scale silhouettesBongopete (photograph) (Leporidae) · Andrew A. Farke (human silhouette, CC-BY 3.0)
  • AnAge (HAGR)CC-BY 3.0longevity, maturity, and gestation figures
  • IUCN Red Listattributed factthe global conservation status
  • Global Biotic Interactions (GloBI)CC0 · public domainthe food web
  • Amniote Life-History DatabaseCC0 · public domainreproduction figures
  • EltonTraitsCC0 · public domaindiet and foraging-activity data