30
Pull-thru
USACEJohn Day Lock and Dam, Lake Umatilla · Washington
Plymouth Park
Overview Plymouth Campground is located by the small town of Plymouth, Washington.
Sites3329 reservable
Elev.289ft
Comf.n/a
Max rig55 ft30 pull-thru
Electric3210×50-amp
From Yakima1h47real 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
Sits at 289 ft. 33 sites total: 29 reservable and 4 first-come, first-served. Of the sites, 30 pull-through, 10 with 50-amp, and the longest takes a 55-ft rig. Within about 4 miles: 1 peak, lake or river access.
The campground at a glance
01 · CHARACTER
Reads strongest on shade and reservability. Softest on roomy sites.
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.
Getting there
03 · ACCESS
01
Yakima
91 mi
1h47
02
Spokane
164 mi
3h06
03
Seattle
233 mi
4h25
By drive time
Routed road time (OSRM). Nearest major highway 0.7 mi away.
Picking your site
04 · 33 SITES
Color byShow only
32 mapped sites · dot color = seclusion · click a dot for details. Basemap © OpenStreetMap.
0
Walk-in
10
50-amp
0
Accessible
0
Prime
33
Sites
★ The standout
Site 03
PPAR · pull-through · shaded.
To neighbor
98 ft
Max rig
49 ft
Type
Pull-thru
What's within four miles
05 · TRAILS · PEAKS · WATER
Trails & Peaks
Trail segments
77
Peaks
1
Viewpoints
2
Water & Access
Lake / river access
yes
To nearest major road
0.7 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.