Thousand Trails High-Use Parks: The Complete List, Dates & Rules (2026)

Every few weeks somebody in a Thousand Trails Facebook group asks the same question: “Which parks are high use, and what are the dates?” And every few weeks, thirty people answer from memory, half of them wrong, and somebody eventually says “it’s on the website.”

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It is on the website. It’s also behind the member login, three menus deep in the FAQ, and it changes from time to time. So here it is in one place — the full list straight from Thousand Trails, the restricted dates, the two-reservation rule that trips everyone up, the lesser-known 28-day parks, and (because this is what I actually care about) what all of it should mean when you’re deciding which membership to buy.

I’ll keep this one mostly straight. Bookmark it. I’ll keep the table current — the “last verified” date sits right above it.

Last verified against the Thousand Trails member FAQ: August 18, 2026

What "High Use" Actually Means

Thousand Trails designates a handful of its parks as High Use Preserves — the ones everybody wants, in the season everybody wants them. To keep those parks from being locked up by a few members, TT layers extra restrictions on top of your normal membership rules during the restricted dates only. Outside those dates, a high-use park is just a park.

During the restricted window, four things change:

Reservation cap. Non-Alliance members can hold two high-use reservations on the books at a time. Alliance members can hold three. That’s two (or three) total, anywhere in the country — not two per region, not two per park.
Length of stay. Stays are limited to 14 consecutive days, regardless of what your membership normally allows.
Guest campsites. Not available during restricted dates. Bring-a-friend season is the off season.
Guest rental units. Cabins and rentals for guests can be requested no more than two weeks in advance.

One wrinkle inside the wrinkle: at the Leisure Time parks (the Washington-state parks that came into TT through the Leisure Time system — Grandy Creek and Thunderbird on this list), the cap is two reservations for every membership type, Alliance included.

ℹ️ The rule that everyone gets wrong: the reservation cap is a total, counted across every high-use park in the network. Two on the books means two — if you’re holding Orlando and Peace River for January, that’s your pair, and you can’t add Three Flags until one of those stays is behind you. Once you check out of one, you can book the next.

The High-Use Parks and Their Restricted Dates

TT updates this list occasionally; if you spot a change, tell me and I’ll fix it. Click a column header to sort.

State	Park	Restricted Dates	Notes
CA	Morgan Hill	May 20 – Sept 15	Also on the 28-day list
CA	Turtle Beach	Year round	Always high use
CA	Wilderness Lakes	Dec 1 – Mar 31
FL	Orlando	Dec 15 – Apr 15
FL	Peace River	Dec 15 – Apr 1
FL	Three Flags	Dec 15 – Apr 15
NJ	Lake and Shore	May 23 – Sept 1
NV	Las Vegas	Nov 1 – Feb 29	Two-day "pass-through" only
OR	Bend/Sunriver	May 23 – Sept 1
OR	Seaside	June 12 – Sept 12
OR	Whalers Rest	May 15 – Sept 15
PA	Hershey	May 23 – Sept 15
WA	Grandy Creek	May 23 – Sept 1	Leisure Time park — 2-reservation cap for all tiers
WA	Thunderbird	May 15 – Sept 15	Leisure Time park — 2-reservation cap for all tiers

A few notes on the table:

Las Vegas is the odd one out. During its restricted window it’s a two-day pass-through — a place to sleep on the way somewhere, not a place to winter.
Turtle Beach is high use year round. There is no off season at Turtle Beach.
Morgan Hill appears on both lists — high use and 28-day. It’s the most restricted park in the system.
Two patterns jump out: the Florida and Southern California parks are winter high use (roughly December through March/April), and the Pacific Northwest, Pennsylvania, and New Jersey parks are summer (roughly late May through mid-September). Which is another way of saying: the restrictions kick in exactly when you’d want to be there.

The 28-Day Parks (The Rule Almost Nobody Knows About)

Separate from high use, three parks carry a 28-day restriction during their busy season: after you leave, you must spend 28 days elsewhere before you can return. Compare that to the normal “7 days out” rhythm most members plan around, and you can see how it changes a loop.

State	Park	Restricted Dates	Notes
CA	Morgan Hill	May 20 – Sept 15	Also a high-use park
CA	Palm Springs	Dec 1 – Mar 31	Grey area — TT says it also counts as high use
WA	Mount Vernon	June 1 – Sept 15	Grey area — TT says it also counts as high use

✅ Pro tip: If you were planning to bounce in and out of Palm Springs all winter — a couple of weeks in, a week at a neighbor, back again — that plan doesn’t work between December and March. Once you leave Palm Springs, you’re gone for four weeks. Build the loop accordingly.

The Grey Area (Because There Is One)

Ask Thousand Trails directly and you’ll be told that Palm Springs and Mount Vernon are also treated as high-use parks — that reservations there count against your two-reservation cap and that the 14-day stay limit applies. That is not what the published list says, and it isn’t what I’ve seen in practice: as I write this I’m parked at Mount Vernon for 20 days, square in the middle of its restricted window, and nobody has asked me to burn an extension week or cut the stay short.

So here’s my honest advice: plan as if Palm Springs and Mount Vernon count — assume they take one of your two slots and assume 14 days — and treat anything longer as a pleasant surprise. If you’re building a season around either park, call the reservation line and ask them to confirm how they’re treating it this year, and get the answer in your booking notes. It’s the one line item on this page where “it depends who you ask” is the truthful answer.

Why This Matters When You're Choosing a Membership

Here’s where I stop being a reference page and start being me.

Every non-Alliance membership gets the same two. Journey, Explore, Adventure — the high-use cap doesn’t care what you paid. I go deep on this in my Journey vs. Explore vs. Adventure comparison, but the short version is that the tiers separate on booking window, max stay, and park-to-park — not on the high-use cap. Only the Alliance overlay bumps you to three, and if you’re wondering whether that’s worth chasing, I wrote a whole piece on what Alliance actually is and what it’s worth (spoiler: it’s a real perk, and it’s also not an Adventure).

Where the tiers do separate is what happens around the cap. Adventure’s 180-day booking window means Adventure members are grabbing high-use dates two months before a Journey member’s window even opens. And Adventure is the only tier that can use extension weeks at high-use parks (two per year at $99) — so an Adventure member can stretch a 14-day high-use stay where a Journey or Explore member has to pack up. If your travel plans revolve around this list, that’s a meaningful difference. If they don’t, it isn’t.

Florida is the stress test. All three Florida Thousand Trails parks — Orlando, Peace River, Three Flags — are high use, in exactly the window every snowbird in America wants them. So your entire “core network” in the state is capped at two reservations at a time. I lived that scramble and wrote it up in Can You Actually Spend the Winter in Florida with Thousand Trails? — including how the Trails Collection, not the TT parks, ended up saving my season.

The other winter cluster — Wilderness Lakes and Palm Springs in Southern California, plus Las Vegas as a pass-through — plays by the same rules. Plan those two SoCal parks as your pair, and know that Palm Springs is a 28-day park on top of it.

⚠️ Don’t buy a membership around a plan the rules won’t allow. If your dream is January through March at TT Orlando, understand that no membership tier lets you book more than 14 days at a time there, and that you’ll be competing for those days with people who booked 180 days out. That’s not a reason not to join. It’s a reason to plan the winter around Trails Collection parks with a TT park or two as anchors — which is exactly how the people who do this well actually do it. The full playbook — the TT Shuffle, and how to book your high-use dates as efficiently as possible — is in my 9 trail-tested secrets to maximizing your Thousand Trails membership.

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Ty's TakeAways

The list is short — 14 high-use parks and 3 twenty-eight-day parks (with Palm Springs and Mount Vernon in a grey zone that TT will tell you counts as high use) — and it's above, with dates. Bookmark it; I'll keep it current.
Two high-use reservations on the books at a time for every non-Alliance membership, anywhere in the country. Three for Alliance. Two for everybody at the Leisure Time parks.
14-day max stay, no guest sites, and rentals only two weeks out during the restricted dates.

The tiers don't differ on the cap — they differ on the booking window and on high-use extension weeks, and that's where Adventure earns its keep for people who live around this list.
Florida and SoCal winters run on the Trails Collection with TT parks as anchors. Plan that way and the cap stops being a problem.

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Go Well. Travel Well. Do Well.
~Ty & Odie

Chasing great mountain biking, camping smart, and living full-time in an RV. Hard-won wisdom. Zero fluff. Live Free. Adventure Often

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