Bison in California in May
Yes, May is a good month to see bison in California. It is the 7th busiest month of the year, with 521 of the 6,342 sightings logged across the year (8.2%), based on verified iNaturalist records.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Good month for bison in California
8.2%
of yearly sightings
521
records in May
#7
busiest month of 12
6,342
verified records a year
April 9.6%, May 8.2%, June 5.7%. Busiest month is March at 12.5%.
6,342 verified observations of bison in California, recorded across 12 months of the year on iNaturalist.
When bison are recorded in California
Peak month
March
792 records (12.5% of the year)
| Month | Observations | Share |
|---|---|---|
| Januarypeak | 670 | 10.6% |
| Februarypeak | 777 | 12.3% |
| Marchpeak | 792 | 12.5% |
| April | 609 | 9.6% |
| May | 521 | 8.2% |
| June | 364 | 5.7% |
| July | 268 | 4.2% |
| August | 299 | 4.7% |
| September | 392 | 6.2% |
| October | 499 | 7.9% |
| November | 610 | 9.6% |
| December | 541 | 8.5% |
Bison you are most likely to see
| Species | Verified observations |
|---|---|
| Bighorn Sheep | 5,418 |
| American Bison | 642 |
| Aoudad | 46 |
| Domestic Sheep | 40 |
| Domestic Goat | 37 |
| Domestic Cattle | 31 |
| Himalayan Tahr | 1 |
In California, May carries 8.2% of the year's bison sightings, about 0.1 points below an even month-to-month split. That makes it the 7th busiest of the twelve months, out of 12 months with recorded activity.
Activity is easing off from April (9.6%) into May, and it heads toward June (5.7%) after. The busiest month is March (12.5%), so if timing is flexible, that window is the safer bet.
The bison most often recorded in California are Bighorn Sheep, American Bison and Aoudad. Those counts are annual totals rather than a May split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in May itself.
Which bison you are most likely to see
- Bighorn Sheep5,418 records
- American Bison642 records
- Aoudad46 records
- Domestic Sheep40 records
- Domestic Goat37 records
- Domestic Cattle31 records
Plan your bison trip in California
Start with live tours near Alcatraz Island, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near Alcatraz Island
Use the live GetYourGuide widget to compare local departures and activity styles close to the main bison viewing area.
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Stay nearbyStay near Alcatraz Island
Compare hotels, cabins and lodges close to the best bison viewing area in California.
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Broader backupBook a bison tour in California
Compare guided wildlife tours, boat trips and nature experiences if you want a second travel network beyond the live widget.
Gear to see them
Frequently asked questions
Can you see bison in California in May?+
Yes. May accounts for 521 of the 6,342 verified bison sightings logged in California across the year, which is 8.2% of the annual total.
Is May a good time to see bison in California?+
May is the 7th busiest month. It is workable, though March and February is the stronger window for a reliable sighting.
What month is best for bison in California?+
March is the single busiest month, with the broader peak running through March, February and January, based on 6,342 verified observations.
Which bison are you most likely to see in California?+
The most-recorded species in California are Bighorn Sheep, American Bison and Aoudad, based on all-time iNaturalist counts.
See bison in California in other months
More places to see bison
More wildlife in California