Rocky Mountain National Park is the third most-visited national park in the country, pulling in close to 4.7 million visitors a year — and close enough to Denver that it's a completely legitimate day trip. That popularity is exactly why the park runs a reservation system during peak season, and it's the single biggest thing to understand before you plan your day, whichever way you want to spend it.
The 2026 timed-entry reservation you need to know about
From May 22 through mid-October, you need a timed-entry reservation to enter Rocky Mountain National Park during certain hours. There are two permit types, and which one you need depends on where you're headed:
Timed Entry covers the park generally — Trail Ridge Road, the west side, most trailheads outside the Bear Lake corridor. Required roughly 9 a.m. to 2 p.m.
Timed Entry + Bear Lake Road is required specifically if you're heading into the Bear Lake corridor, where the trail to Emerald Lake starts. Required roughly 5 a.m. to 6 p.m.
Reservations release monthly on Recreation.gov, cost a small processing fee, and are non-transferable and non-refundable — and they sell out fast. A limited batch also opens the night before at 7 p.m. for last-minute planners, but that's a backup, not a plan. Booking the wrong permit type for where you're actually headed is a common, avoidable way for a first-timer's day to go sideways at the gate.
Two ways to spend your day here
RMNP rewards different kinds of visitors differently. Here are the two shapes a day usually takes.
For hikers: Bear Lake to Emerald Lake
This is the classic RMNP hike for a reason. It's a moderate, out-and-back trail — about 3.5 miles round trip, climbing from roughly 9,400 to 10,100 feet — that passes three alpine lakes on the way: Nymph Lake, Dream Lake, and finally Emerald Lake itself, framed by Hallett Peak and Flattop Mountain. It's accessible enough for most fitness levels, but the elevation still asks something of you, especially if you're coming from sea level.
For sightseers: Trail Ridge Road, or its winter alternative
If hiking isn't the goal, Trail Ridge Road is the other classic RMNP day — the highest continuously paved road in the country, climbing above 12,000 feet with some of the most dramatic roadside views anywhere in Colorado. No trail required, just time in the car and frequent stops at overlooks. It's seasonal, typically open from around Memorial Day through mid-October depending on snowpack — which lines up closely with the timed-entry window above, so if you're visiting when a permit's required, Trail Ridge Road is very likely open too, and vice versa.
When Trail Ridge Road is closed for the season, the day doesn't disappear — it shifts to the park's other reliable, lower-elevation stops: Bear Lake, Alluvial Fan, Sprague Lake, Moraine Park, and Sheep Lakes. It's a different day than the summit drive, but not a lesser one, and it's accessible no matter what the snowpack's doing higher up.
Both days end the same way: Estes Park
Whichever version of the day you choose, Estes Park is the natural close. It's the park's gateway town, with a walkable core of shops, galleries, and restaurants — and it's common to see elk wandering through town itself, not just in the park. The town's landmark is the Stanley Hotel, a grand 1909 building whose history as the inspiration for Stephen King's The Shining has made it a destination well beyond that connection; it's simply a striking piece of Colorado architecture worth the stop.
What to pack, either way
Parts of RMNP sit above 12,000 feet, and mountain weather changes fast regardless of what it looks like in Denver that morning. Bring a warm layer no matter the forecast, along with sun protection — UV exposure is stronger at altitude — and plenty of water. If you're hiking to Emerald Lake, real hiking shoes with good tread matter more than people expect on what looks like a moderate trail on paper.
Doing it yourself vs. booking a private guided day
A few pieces of an RMNP day are worth being honest about before committing to planning it all yourself:
Getting the permit type right. Two different reservations, two different windows, and booking the wrong one for your destination means finding out at the gate, not before. (This applies specifically to trips between late May and mid-October — outside that window, no timed-entry reservation is required at all, so this particular headache disappears on its own.)
Bear Lake parking fills up early. It's one of the most popular trailheads in the park, and arriving even a little late in peak season can mean a long walk just to start your hike.
A full day behind the wheel either way. Trail Ridge Road is stunning to drive, and Estes Park is worth the stop — but someone has to drive all of it, on top of the trip from Denver on both ends.
Scout Colorado's private tours run every month of the year and handle the reservation piece specifically — securing the correct timed-entry permit when one's required, and adapting the day's stops when it isn't, so you're not the one tracking release dates, guessing which permit type you need, or wondering what's actually open in January. From there, choose the day that fits you: the guided hike to Emerald Lake for the classic RMNP trail experience, or the sightseeing tour if you'd rather take in the views without the hike. Either way, the planning is already handled before you arrive.
Ready to see it yourself?
Hike to Emerald Lake or take in Trail Ridge Road — you pick the day, we'll handle the planning.