USACE · John Day Lock and Dam, Lake Umatilla
Plymouth Park

26 of 31 sites fit 42 ft
Book one of 19, 23, 03, 02, 04, 12 and 20 more
- Longest for your rig
- 55 ft
- Booking
- Reservable
- Hookups
- electric · water · sewer
- Entry
- Pull-through
- ADA sites
- —
- Elevation
- 291 ft
- Vehicles
- 1 per site
Every site here is listed for one vehicle. Agencies differ on whether a truck and the trailer it tows count as one or two, so this may not affect a fifth wheel — but it does decide whether a second car can come. Worth a call before you rely on it.
Book on Recreation.gov →the official reservation system; we take no cut
Every bookable site
The 26 sites that take a 42 ft rig, drawn where they sit.
Fits your 42 ft rig — 26 sites
1955 ft limit · pull · paved2354 ft limit · back · paved0349 ft limit · pull · paved0248 ft limit · pull · paved0448 ft limit · pull · paved1247 ft limit · pull · paved0646 ft limit · pull · paved1646 ft limit · pull · paved1846 ft limit · pull · paved1545 ft limit · pull · paved2745 ft limit · pull · paved2945 ft limit · pull · paved3145 ft limit · pull · paved3245 ft limit · pull · paved0144 ft limit · pull · paved1044 ft limit · pull · paved1344 ft limit · pull · paved2144 ft limit · pull · paved2844 ft limit · pull · paved0543 ft limit · pull · paved1743 ft limit · pull · paved2243 ft limit · pull · paved0842 ft limit · pull · paved1142 ft limit · pull · paved1442 ft limit · pull · paved3042 ft limit · pull · paved
Too short for 42 ft — 4 sites
Length never published — 1 site
Within 60 miles
| Map marker# | Campground | Distance | Sites | Longest for your rig | Hookups |
|---|---|---|---|---|---|
| 1 | Hood Park | 25 mi NE | 67 | 105 ft | electric · pull-through |
| 2 | Charbonneau Park and Campground | 33 mi NE | 52 | 142 ft | electric · pull-through |
| 3 | Fishhook Park | 38 mi NE | 51 | 133 ft | electric · pull-through |
| 4 | Ditch Creek Guard Station Cab | 56 mi S | 1 | — | none |
Everything else on record
- Bookable sites
- 31
- Non-site records excluded
- 2
- Max occupancy per site
- 60
- Reservable sites
- 29
- Coordinates
- 45.9337, -119.3507
- Nearest place
- Plymouth
- Phone
- 541-739-1135
- Elevation
- 291 ft
Sources
- Recreation Information Database (RIDB) · fetched from
https://ridb.recreation.gov/api/v1/facilities/233587· retrieved 2026-08-11 · public-domain - USGS Elevation Point Query Service · fetched from
https://epqs.nationalmap.gov/v1/json· retrieved 2026-08-11 · public-domain