Private operator
Near Twin Mountain, New Hampshire: $55–$145/night, no posted rig-length limit. Open May through October. Book 12 months ahead via KOA portal.
Private operator
Managing authority
Near Twin Mountain, New Hampshire
How much does camping at Twin Mountain / Mt Washington KOA cost, and when is it open?
Twin Mountain / Mt Washington KOA near Twin Mountain, New Hampshire (Private operator) — camping fee $55–$145/night, season May through October, RV size limit Big rigs welcome. Reservations: 12 months ahead via KOA portal — book direct through the official channel.
The numbers
Fee range
$55–$145/night
Season open
May through October
RV size limit
Big rigs welcome
Reservation window
12 months ahead via KOA portal
The insider read
Closest full-hookup camp to Mt Washington Cog Railway. White Mountain National Forest staging point. Leaf weekends Sept-Oct book 18 months ahead.
Original analysis from PickRV — synthesised from public sources you can verify, pulling the operational details competitor guides typically skip.
Verify at koa.comOn site
Book it right
PickRV doesn't handle campground bookings — reserve direct through the official channel so policies and cancellations flow through one record.
Opens koa.com
Every fact above is sourced from the managing agency's canonical page. Cross-check fee, season, and size limit before you depend on them.
Match the campground's size limit and hookup level to a vehicle category, then plan the rest of the trip.
Keep exploring
Near Franconia
StateInsider tip · Inside Franconia Notch — Cannon Mountain + Old Man of the Mountain (memorial) + The Basin all walkable. Spring fed pool. Books out Sept-Oct leaf weekends instantly.
Near Gorham
USFSInsider tip · Largest USFS camp in the East (176 sites). Mt Washington Auto Road 5 mi. Pinkham Notch ranger station nearby for backcountry permits + weather updates (most extreme in the East).
Near Pittsburg
StateInsider tip · Northernmost state-park camp in NH — moose-spotting country (10x more than NH average). Connecticut Lakes trout fishing. Drive to Canadian border 25 min.
Near Nottingham
StateInsider tip · Glacial erratic boulder field — climbers' paradise. Three islands accessible by paddle. Boulder Loop sites are near the climbing area.
Nearby & related
Sourced costs, campground directories, and the places worth a detour — the next layer of New Hampshire trip planning.
Before you go
New Hampshire rules
Verified 2026-05-10