No detected openings were recorded in the last 90 days. Campsite Sniper monitors Threemile Campground continuously and will alert you if that changes.
Of the 40 tracked site-nights (Sep 18 – Sep 19, 2026): 40 on sites not offered for online reservation (first-come, first-served or administrative). Of the facility's 21 monitored sites, 8 can be reserved online and 12 are first-come, first-served (1 closed).
No online availability right now
Load status
Sep 18 – Sep 19, 2026Of the 40 tracked site-nights (Sep 18 – Sep 19, 2026): 40 on sites not offered for online reservation (first-come, first-served or administrative).
Open dates by month
Sep 2026 – Sep 2026No month in range currently shows online availability. 0 open site-nights across the tracked window — these site-nights are on sites not offered for online reservation.
Holiday windows
Sites open per night · of 20 sites| Window | Night | Sites open | Status |
|---|---|---|---|
| Labor Day | SAT Sep 5 | 0 | None open |
| SUN Sep 6 | 0 | None open | |
| MON Sep 7 | 0 | None open |
Labor Day: no online availability on any tracked night.
About Threemile Campground
Overview
Threemile Campground is located just three miles from the east entrance of Yellowstone National Park, and 50 miles from the full service gateway community of Cody, in northwestern Wyoming. The area is an ideal destination for a family getaway, with many opportunities for outdoor recreation. Hard-sided camp trailers and RVs are required.
Recreation
Great opportunities for hiking, fishing, scenic driving and wildlife viewing are available around the campground. The North Fork of the Shoshone River is a popular fly-fishing location for rainbow and Yellowstone cutthroat trout. The nearby Pahaska Trail provides access into the North Absaroka Wilderness Area.
Facilities
The campground offers family campsites for hard-sided camp trailers and RVs. Some sites overlook the river. Each site is equipped with a table, campfire ring and food storage locker. Vault toilets, hand-pumped drinking water (two spigots, one spigot is accessibiliy compliant) and trash collection are provided. Campers may gather firewood in the area.
Natural Features
The campground is situated along the North Fork of the Shoshone River and has beautiful views of the surrounding mountains. A forest of lodgepole pine covers the campground, which sits at an elevation of 6,700 feet.
A wide variety of wildlife lives in the area. Visitors often glimpse grizzly bears, deer, elk, bison, moose, fox, coyotes and bald eagles.
Nearby Attractions
Pahaska Tepee is just a mile west of the campground. This historic site is home to Buffalo Bill's original hunting lodge, built in 1904. Tours are offered daily between Memorial Day and Labor Day. Pahaska also offers guided horseback rides, a gift shop, restaurant and lodging.
Yellowstone National Park's east entrance is three miles from the campground via the Buffalo Bill Cody Scenic Byway. The park offers unparalleled wildlife viewing opportunities, as well as breathtaking scenery and unique geological features.
The small, historic city of Cody offers a variety of dining, lodging and shopping options. The Buffalo Bill Historical Center offers extensive displays of Greater Yellowstone natural history, Plains Indians artifacts, western art, firearms, Buffalo Bill memorabilia and a wild sheep exhibit.
Getting there
From Cody, Wyo., follow Sheridan Avenue west through Cody until the road leaves town and becomes the Buffalo Bill Cody Scenic Byway (U.S. Highway 14/16/20). The campground is located almost 49 miles west of Cody, on the south side of U.S. Highway 14/16/20, next to the Shoshone River.
View on Recreation.gov ↗ Get directions ↗
Photo gallery
FAQ
How do I get a reservation at Threemile Campground?
Campsite Sniper's current snapshot shows none of the 40 tracked site-nights open for online reservation at Threemile Campground. That can mean dates are reserved, closed, not yet released, or offered first-come, first-served rather than online. Pick a site on the map to see its calendar, or set a free Campsite Sniper alert. You complete the reservation yourself on Recreation.gov.
Does Campsite Sniper book this campground for me?
No. Campsite Sniper sends alerts and direct Recreation.gov links. It never books, pays for, holds, hoards, or resells reservations.
How current is this availability data?
Campsite Sniper re-checks public Recreation.gov availability for this facility every hour and republishes whenever anything changes. This facility's data last changed at Sep 18, 2026 15:19 UTC; an older timestamp means nothing has changed since that time, not that checking stopped. Always confirm final availability on Recreation.gov when you book.
Which sites at Threemile Campground fit a 35-foot RV?
20 of the 20 sites that support RV analysis have a recorded maximum of 35 ft or more; the longest recorded is 75 ft.
Does Threemile Campground have online availability right now?
As of the Sep 18, 2026 snapshot, none of the 40 tracked site-nights are open for online reservation. That can mean dates are reserved, closed, not yet released, or offered first-come, first-served rather than online. A free Campsite Sniper alert tells you if any date opens online.
Stop refreshing. Let the app watch it.
Lakefront, hookups, your RV length, weekends only - set it as picky as you want.
We run paced availability checks for Threemile Campground. One watch covers every matching online-reservable site.
When a match opens, you get a push with a Recreation.gov link so you can review and book it yourself.
Alerts monitor online-reservable inventory only; first-come, first-served sites are not included.