Bison in South Dakota in September
Yes, September is a good month to see bison in South Dakota. It is the 5th busiest month of the year, with 643 of the 5,441 sightings logged across the year (11.8%), 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 South Dakota
11.8%
of yearly sightings
643
records in September
#5
busiest month of 12
5,441
verified records a year
August 15.1%, September 11.8%, October 6.2%. Busiest month is July at 22.1%.
5,441 verified observations of bison in South Dakota, recorded across 12 months of the year on iNaturalist.
When bison are recorded in South Dakota
Peak month
July
1,205 records (22.1% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 39 | 0.7% |
| February | 31 | 0.6% |
| March | 123 | 2.3% |
| April | 205 | 3.8% |
| May | 757 | 13.9% |
| Junepeak | 1,127 | 20.7% |
| Julypeak | 1,205 | 22.1% |
| Augustpeak | 819 | 15.1% |
| September | 643 | 11.8% |
| October | 337 | 6.2% |
| November | 96 | 1.8% |
| December | 59 | 1.1% |
Bison you are most likely to see
| Species | Verified observations |
|---|---|
| American Bison | 3,010 |
| Bighorn Sheep | 2,005 |
| Mountain Goat | 403 |
| Domestic Cattle | 13 |
In South Dakota, September carries 11.8% of the year's bison sightings, about 3.5 points above an even month-to-month split. That makes it the 5th busiest of the twelve months, out of 12 months with recorded activity.
Activity is easing off from August (15.1%) into September, and it heads toward October (6.2%) after. The busiest month is July (22.1%), so if timing is flexible, that window is the safer bet.
The bison most often recorded in South Dakota are American Bison, Bighorn Sheep and Mountain Goat. 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
- American Bison3,010 records
- Bighorn Sheep2,005 records
- Mountain Goat403 records
- Domestic Cattle13 records
Plan your bison trip in South Dakota
Start with live tours near Badlands National Park, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near Badlands National Park
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 Badlands National Park
Compare hotels, cabins and lodges close to the best bison viewing area in South Dakota.
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Broader backupBook a bison tour in South Dakota
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 South Dakota in September?+
Yes. September accounts for 643 of the 5,441 verified bison sightings logged in South Dakota across the year, which is 11.8% of the annual total.
Is September a good time to see bison in South Dakota?+
September is the 5th busiest month. It is workable, though July and June is the stronger window for a reliable sighting.
What month is best for bison in South Dakota?+
July is the single busiest month, with the broader peak running through July, June and August, based on 5,441 verified observations.
Which bison are you most likely to see in South Dakota?+
The most-recorded species in South Dakota are American Bison, Bighorn Sheep and Mountain Goat, based on all-time iNaturalist counts.
See bison in South Dakota in other months
More places to see bison
More wildlife in South Dakota