Best Time to See Bison in Washington
August, July and September is the best time to see bison in Washington. Based on 2,047 verified iNaturalist observations, here is exactly when bison are most active across the year in Washington.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
2,047 verified observations of bison in Washington, recorded across 12 months of the year on iNaturalist.
When bison are recorded in Washington
Peak month
August
476 records (23.3% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 43 | 2.1% |
| February | 38 | 1.9% |
| March | 70 | 3.4% |
| April | 109 | 5.3% |
| May | 107 | 5.2% |
| June | 218 | 10.6% |
| Julypeak | 473 | 23.1% |
| Augustpeak | 476 | 23.3% |
| Septemberpeak | 282 | 13.8% |
| October | 138 | 6.7% |
| November | 58 | 2.8% |
| December | 35 | 1.7% |
Bison you are most likely to see
| Species | Verified observations |
|---|---|
| Mountain Goat | 1,413 |
| Bighorn Sheep | 525 |
| Domestic Sheep | 52 |
| Domestic Cattle | 35 |
| Domestic Goat | 4 |
Sightings of bison in Washington peak in August, when 476 of the year's 2,047 verified observations are logged — about 23.3% of the annual total. Activity stays high through August, July and September.
The quietest stretch is December, February and January, when bison are hardest to find — December sees just 35 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The bison you are most likely to encounter in Washington are Mountain Goat, Bighorn Sheep and Domestic Sheep — the most-recorded species in the state. Each keeps its own seasonal rhythm, but the month-by-month pattern above reflects every reported sighting together.
Where to go
Best places to see bison in Washington
- Ebey's Landing National Historical Reserve — National Historical Reserve
- Fort Vancouver National Historic Site — National Historic Site
- Lewis & Clark National Historic Trail — National Historic Trail
- Lewis and Clark National Historical Park — National Historical Park
- Mount Rainier National Park — National Park
- Nez Perce National Historical Park — National Historical Park
Plan your bison trip in Washington
Start with live tours near Ebey's Landing National Historical Reserve, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near Ebey's Landing National Historical Reserve
Use the live GetYourGuide widget to compare local departures and activity styles close to the main bison viewing area.
Booking.com
Stay nearbyStay near Ebey's Landing National Historical Reserve
Compare hotels, cabins and lodges close to the best bison viewing area in Washington.
Viator
Broader backupBook a bison tour in Washington
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
What is the best month to see bison in Washington?+
August is the single best month, and the broader peak window runs through August, July and September, based on 2,047 verified iNaturalist observations.
When are bison hardest to see in Washington?+
December is the quietest month for bison in Washington, with only 35 verified records.
Are bison active year-round in Washington?+
Bison are recorded in 12 of 12 months in Washington, so they can be seen year-round, with a clear peak in August.
More places to see bison
More wildlife in Washington