Bison in Idaho in September
Yes, September is a good month to see bison in Idaho. It is the 4th busiest month of the year, with 37 of the 435 sightings logged across the year (8.5%), 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 July 2, 2026.
Good month for bison in Idaho
8.5%
of yearly sightings
37
records in September
#4
busiest month of 12
435
verified records a year
August 14.5%, September 8.5%, October 5.1%. Busiest month is July at 24.8%.
435 verified observations of bison in Idaho, recorded across 12 months of the year on iNaturalist.
When bison are recorded in Idaho
Peak month
July
108 records (24.8% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 11 | 2.5% |
| February | 5 | 1.1% |
| March | 16 | 3.7% |
| April | 32 | 7.4% |
| May | 32 | 7.4% |
| Junepeak | 76 | 17.5% |
| Julypeak | 108 | 24.8% |
| Augustpeak | 63 | 14.5% |
| September | 37 | 8.5% |
| October | 22 | 5.1% |
| November | 24 | 5.5% |
| December | 9 | 2.1% |
Bison you are most likely to see
| Species | Verified observations |
|---|---|
| Bighorn Sheep | 245 |
| Mountain Goat | 123 |
| Domestic Cattle | 41 |
| American Bison | 6 |
| Domestic Sheep | 5 |
| Domestic Goat | 3 |
In Idaho, September carries 8.5% of the year's bison sightings, about 0.2 points above an even month-to-month split. That makes it the 4th busiest of the twelve months, out of 12 months with recorded activity.
Activity is easing off from August (14.5%) into September, and it heads toward October (5.1%) after. The busiest month is July (24.8%), so if timing is flexible, that window is the safer bet.
The bison most often recorded in Idaho are Bighorn Sheep, Mountain Goat and Domestic Cattle. Those counts are annual totals rather than a September split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in September itself.
Which bison you are most likely to see
- Bighorn Sheep245 records
- Mountain Goat123 records
- Domestic Cattle41 records
- American Bison6 records
- Domestic Sheep5 records
- Domestic Goat3 records
Plan your bison trip in Idaho
Start with live tours near City Of Rocks National Reserve, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near City Of Rocks National Reserve
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 City Of Rocks National Reserve
Compare hotels, cabins and lodges close to the best bison viewing area in Idaho.
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Broader backupBook a bison tour in Idaho
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 Idaho in September?+
Yes. September accounts for 37 of the 435 verified bison sightings logged in Idaho across the year, which is 8.5% of the annual total.
Is September a good time to see bison in Idaho?+
September is the 4th busiest month. It is workable, though July and June is the stronger window for a reliable sighting.
What month is best for bison in Idaho?+
July is the single busiest month, with the broader peak running through July, June and August, based on 435 verified observations.
Which bison are you most likely to see in Idaho?+
The most-recorded species in Idaho are Bighorn Sheep, Mountain Goat and Domestic Cattle, based on all-time iNaturalist counts.
See bison in Idaho in other months
More places to see bison
More wildlife in Idaho