0
Pull-thru
USFSOkanogan-Wenatchee National Forest · Washington
Tumwater Group Site
Overview Tumwater Campground, located at the confluence of Chiwaukum Creek and the Nenatchee River in the Okanogan-Wenatchee National Forest, offers a serene setting for groups and large gatherings.
Sites1all reservable
Elev.1,726ft
Comf.Apr-Oct7 months
Max rig25 ft
Electric1sites
From Yakima2h14real road time
The honest read
Synthesized from
RIDB · Open-Meteo
OSM · OSRM
Updated 2026-05-27
RIDB · Open-Meteo
OSM · OSRM
Updated 2026-05-27
At 1,726 ft, Tumwater Group Site has a 7-month comfortable window (Apr-Oct). Winter nights average around 28°F, so the shoulder seasons turn cold fast. All 1 sites are reservable in advance, so plan ahead. Popular weekends book out. Within about 4 miles: 3 named hiking routes, 33 peaks, lake or river access.
The campground at a glance
01 · CHARACTER
Reads strongest on shade and reservability. Softest on big-rig fit.
Six axes, each scored relative to every other federal campground in the region: quiet (miles to a major road), cool (elevation), roomy (average site spacing), shade, RV-fit (longest rig), and how reservable it is. All six come from data, nothing hand-tuned.
When to go
02 · CLIMATE
avg highavg lowfrost-freedriest · Jul
Apr-Oct
Comfortable window: nights stay above 35°F, days below 90°F.
91%
Of summer weekend-days are dry.
Apr 30
Last spring frost; first fall frost Oct 19.
57°F
Average July low.
Getting there
03 · ACCESS
01
Yakima
103 mi
2h14
02
Seattle
108 mi
2h29
03
Spokane
203 mi
4h07
By drive time
Routed road time (OSRM). Nearest major highway 0.2 mi away.
Picking your site
04 · 1 SITES
0
Walk-in
0
50-amp
1
Accessible
0
Prime
1
Sites
What's within four miles
05 · TRAILS · PEAKS · WATER
Trails & Peaks
Named hiking routes
3
Trail segments
23
Peaks
33
Viewpoints
1
Water & Access
Lake / river access
yes
To nearest major road
0.2 mi
Method
We synthesize public data layers: RIDB and Recreation.gov facility and site records, Open-Meteo climate normals, OpenStreetMap roads, trails, and water, OSRM drive times, and USGS elevation. We take no bookings, no ads, and no paid placements. Independence is the entire point.