- Where
- Rocky Mountain National Park
Colorado, United States - Start / end
- Estes Park to Grand Lake (US 34)
- Length
- 48 mi / 77.2 km (NPS; FHWA)
- Highest point
- 12,183 ft / 3,713 m (NPS)
- Designation
- All-American Road (FHWA)
- Season
- Through travel late May to mid-October (NPS)
- Fees
- $30 per vehicle for 1 day; $35 for 7 days (NPS, 2026)
- Reservations
- Timed entry 9 a.m.–2 p.m., 22 May–12 Oct in 2026
- Status
- Closes to through travel for winter, usually mid-October (NPS); open on the NPS road page updated 6 Oct 2026
- Advisory
- United States
(no State Department level)
Climbed out of pine forest into a country with no trees at all: cold wind, tiny flowers flat against the ground, and fat furry animals whistling at me from the rocks. The car park at the top was higher than most clouds I have met. Everyone got out, said something short, and got back in for their coats. Elk lay in the meadows on the way down.
Route facts
- Route
- Estes Park (Beaver Meadows entrance) to Grand Lake
- Length
- 48 miles (about 77 km), one wayChecked · National Park Service, Rocky Mountain: road status
- Season window
- Through travel from late May to mid-OctoberChecked · National Park Service, Rocky Mountain: operating hours and seasons
- Closures
- Open as read The park’s road status page, updated 6 October 2026, listed through travel as open; the road closes to through travel from mid-October, and the park’s alert feed was empty on 13 October 2026.Live alert: National Park Service, Rocky Mountain: road status
- Fees
- $30 per vehicle for 1 day or $35 for 7 days; non-US residents aged 16 and over pay an extra $100 each in 2026; a $2 timed-entry permit was required from 9 am to 2 pm, 22 May to 12 October 2026Checked · National Park Service, Rocky Mountain: fees
- Cost to enter
- Under $35
- Anchor point
- Fall River Pass (Alpine Visitor Center)
40.44° N, 105.75° W
The short answer
Trail Ridge Road is US Highway 34 through Rocky Mountain National Park in Colorado: 48 miles one way from Estes Park on the east side to Grand Lake on the west, climbing to 12,183 feet. The National Park Service calls it the highest continuous paved road in the United States, and the Federal Highway Administration lists it, with Beaver Meadow Road, as an All-American Road. It is closed to through travel from mid-October to late May. In the 2026 season a timed-entry reservation was needed to enter the park between 9 a.m. and 2 p.m. from 22 May to 12 October, for a $2 booking fee on Recreation.gov, on top of the park entrance fee of $30 per vehicle for a day. On the Park Service’s road page, last updated on 6 October 2026, the road was open to through travel; the park posts day-to-day changes by phone and on its message boards rather than on that page.
Why it's worth knowing
A climb through climates. The Park Service describes the drive as a climb of some 4,000 feet in minutes, from montane forest of aspen and ponderosa pine, through subalpine fir and spruce, to the tree line near 11,500 feet, and then out across eleven miles of alpine tundra. Up there it is normally windy and twenty to thirty degrees colder than in Estes Park or Grand Lake, the growing season may last just forty days, and about 200 species of small alpine plants grow close to the ground. The Park Service names pikas, marmots, ptarmigans and bighorn sheep among the animals seen there; moose feed in the Kawuneeche Valley on the west side, and elk graze the meadows at dawn and dusk.
A road everyone could drive. “It is hard to describe what a sensation this new road is going to make,” Horace Albright, director of the National Park Service, said in 1931 while it was being built; the next year it opened to its first travellers. The older Fall River Road, built from 1913 to 1920 as the first road to the alpine tundra, still climbs to meet it at Fall River Pass: 9.4 miles, unpaved, one way uphill, open to vehicles from early July to early October and closed to vehicles over 25 feet.
A ticket for the middle of the day. Rocky Mountain’s visits grew by 44 percent in eleven years, the Park Service says, and its Day Use Visitor Access Plan, finalised in May 2024, made timed entry permanent for the busy season. In 2026 a “Timed Entry” reservation, the one for a drive over Trail Ridge Road, was needed to enter between 9 a.m. and 2 p.m. from 22 May to 12 October; a separate reservation covered the Bear Lake Road corridor from 5 a.m. to 6 p.m. until 18 October. Entering before 9 a.m. or after 2 p.m. needed none.
The field notes
The Divide, lower down
The road crosses the Continental Divide, where streams part east and west, at Milner Pass, at what the Park Service calls a “surprisingly low” 10,758 feet: well below the road’s high point of 12,183 feet, which it has already passed by the time it reaches the Divide westbound.
Ten byways or thirteen
The Park Service’s Trail Ridge Road page, last updated in 2016, calls it “one of ten America’s Byways in Colorado”. The Federal Highway Administration’s byways site, read on 13 October 2026, lists thirteen in Colorado.
Elk grazing on the alpine tundra, Rocky Mountain National Park, July 2020.
Photograph: M. Reed, National Park Service · Public domain (PD-USGov, US National Park Service) · cropped
Snow still lying on the high tundra along Trail Ridge Road, the Never Summer Mountains beyond, May 2013.
Photograph: KimonBerlin · Trail Ridge Road (8886031895) · CC BY-SA 2.0
- Go through the gate before nine, with a flask, and have the high country nearly to yourself.
- Keep to the path on the tundra, and keep your boots out of the flowers.
- Pack a warm hat, whatever the month. (Item written in the valley. Underlined twice at the top.)
- Get out at the pass where the water divides and stand on it properly, one foot each side.
- Drive down slowly in the evening and count elk until you lose count.
Milner Pass. A low saddle in the Rocky Mountains on Trail Ridge Road, at 10,758 feet, where the road crosses the Continental Divide, the line along which the park’s streams part, east from west. The National Park Service calls the height “surprisingly low”, because the road has already climbed past 12,000 feet on the tundra to the east before it comes down to cross it. The US Geological Survey lists it as Milner Pass (gaz_id 177509), at about 40.42° N, 105.81° W.
Tally, in the marginI had been so much higher that morning that I very nearly drove straight past the great divide. A small sign, a small lake, water quietly choosing which way to go. I went back and stood on it.
Getting there
How to drive it. From the east, the road leaves Estes Park through the park’s Beaver Meadows entrance; from the west, it starts at Grand Lake. The FHWA allows two hours to drive it or a day to visit the places along it; the Park Service suggests at least half a day.
When to go. Late May to mid-October, when the road is open to through travel; the tundra plants have a growing season that may last just forty days, so they flower in high summer. Conditions change fast at this height: the Park Service warns of strong winds, blowing snow and ice at any time, and Colorado’s traction law can apply inside the park, requiring mud-and-snow or all-weather tyres with at least 3/16 inch of tread, or chains or other approved devices.
What to arrange ahead. A park entrance pass: in 2026, $30 per private vehicle for one day or $35 for seven, bought at the entrance or on Recreation.gov. In 2026 the Park Service also charged non-US residents aged 16 and over an additional $100 a person unless they held an annual or America the Beautiful pass. In the timed-entry season, a reservation for the 9 a.m. to 2 p.m. window, released on Recreation.gov at 8 a.m. on the first of the month before, with more at 7 p.m. the evening before. The dates for 2027 had not been published by 13 October 2026.
Safety. The State Department’s travel advisories cover other countries, so none applies here. The hazards are altitude, weather and ice. For the road’s status on the day, the Park Service’s recorded line is 970-586-1222; it does not post day-to-day road status on its website.
Mark this place
Common questions
When does Trail Ridge Road open and close?
Trail Ridge Road in Rocky Mountain National Park is closed to through travel from mid-October to late May, the National Park Service says. Closures can come at any time with the weather; the park’s recorded status line is 970-586-1222.
Do you need a reservation to drive Trail Ridge Road?
In season, during the middle of the day. In 2026 Rocky Mountain National Park required a Timed Entry reservation to enter between 9 a.m. and 2 p.m. from 22 May to 12 October, booked on Recreation.gov for a $2 fee. Entering before 9 a.m. or after 2 p.m. needed no reservation.
How high does Trail Ridge Road go?
Trail Ridge Road reaches 12,183 feet, and eleven of its 48 miles run above the tree line, the National Park Service says. It crosses the Continental Divide lower down, at Milner Pass, 10,758 feet.
Is Trail Ridge Road the highest paved road in the US?
The National Park Service calls Trail Ridge Road, US 34 in Rocky Mountain National Park, the highest continuous paved road in the United States, and the Federal Highway Administration calls it America’s highest continuously paved road.
How long is Trail Ridge Road?
Trail Ridge Road is 48 miles one way, from Estes Park on the east side of Rocky Mountain National Park to Grand Lake on the west, the National Park Service and the Federal Highway Administration say. The FHWA allows two hours to drive it.
How much does it cost to drive Trail Ridge Road?
Driving Trail Ridge Road needs a Rocky Mountain National Park entrance pass: in 2026, $30 per private vehicle for one day or $35 for seven days. Non-US residents aged 16 and over also paid $100 each in 2026 unless covered by an annual or America the Beautiful pass.
What wildlife can you see from Trail Ridge Road?
The National Park Service names pikas, marmots, ptarmigans and bighorn sheep among the animals seen on the alpine tundra of Trail Ridge Road, moose feed in the Kawuneeche Valley on its west side, and elk graze the park’s meadows at sunrise and sunset.
When was Trail Ridge Road built?
Trail Ridge Road was being built in 1931, when National Park Service director Horace Albright predicted it would make a sensation, and it opened to its first travellers in 1932, the Park Service says. It replaced the older Fall River Road, built from 1913 to 1920.