Local Guide Estes Park, CO 5 min read

Rocky Mountain National Park: Best Day Trip Routes from Longmont

RMNP is roughly 40 miles from Longmont — close enough that it should be an easy day trip, far enough that nothing about the drive in is actually easy. Trail Ridge Road tops out at 12,183 feet. Estes Park's tourist traffic chokepoints can add 30+ minutes in summer. Timed entry permits sell out weeks ahead. Here's how to plan a day trip that actually works.

The Quick Answer

Distance from Longmont: 40 miles to the Beaver Meadows entrance, ~75 minutes drive in good conditions. Best route: US-36 west through Lyons to Estes Park. Critical to know: Timed entry permits are required May 23 – October 20 (and need to be reserved well in advance via recreation.gov). Best months: mid-September for elk rut and aspens, late June for wildflowers, anytime in winter if you have AWD and snow experience. The drive itself is the part most people underestimate — Trail Ridge Road has no guardrails in many sections and runs above 11,000 feet for 11 continuous miles.

Two routes from the Front Range

Route 1: US-36 through Lyons (recommended)

From Longmont, head west on Highway 66 to Lyons, then US-36 west all the way to Estes Park. This is the most direct route, the most scenic in the foothills section, and the one with the fewest weather-related closures. Drive time is 60–75 minutes from Longmont, 75–90 from Boulder.

Lyons itself is worth a stop — the historic Oskar Blues Brewery is right on the route, and Stone Cup Cafe is a solid breakfast option if you're heading up early. Past Lyons, US-36 winds through the South St. Vrain Canyon, which is one of the prettier mountain drives on the Front Range.

Route 2: Boulder Canyon to Nederland to Peak-to-Peak Highway

This is the longer, slower, more scenic option — also the option that gets closed in winter. Boulder Canyon (CO-119) west to Nederland, then north on Highway 72 (Peak-to-Peak Highway) to Lyons or directly to Estes. Drive time runs 90 minutes to 2 hours from Boulder.

Worth taking if the goal is the drive itself, you have time, and weather is cooperating. Not the way to go if you have a timed entry slot at 9am and you're leaving at 7am.

Timed entry permits: critical to understand

Since 2020, RMNP has used a timed entry reservation system during peak season (typically late May through mid-October). There are two types of permits, and they affect different parts of the park differently:

Reservations open on a rolling basis — typically the 1st of the prior month at 8am Mountain Time, with additional slots released the day before at 7pm. Reservations are made through recreation.gov for a $2 reservation fee on top of the standard $30 vehicle entry fee. Without a permit during peak hours, you cannot enter the park.

What to actually do during a day trip

If you have one stop

Bear Lake. Half-mile loop trail, paved, accessible to nearly anyone, hits the postcard view. The downside is that everyone else has the same idea — Bear Lake Road parking fills by 8am in summer.

If you have 4–6 hours

Drive Trail Ridge Road. This is the highest paved through-road in the United States — 48 miles, peaks at 12,183 feet, drives across actual alpine tundra. Most people drive about 2/3 of it, turn around at the Alpine Visitor Center, and head back. Allow 3 hours minimum for the round trip from the Beaver Meadows entrance, with stops. Trail Ridge Road is closed in winter (typically late October through Memorial Day weekend, weather-dependent).

If you have a full day

Pick a moderate hike: Emerald Lake (3.6 miles round trip, three lakes en route, classic Colorado views) or Sky Pond (9 miles round trip, harder, much more rewarding) are the popular options. Both are off Bear Lake Road and require the corridor permit.

If you're going for the wildlife

Mid-September through early October is elk rut. The bugling sound carries for miles in the meadows around Moraine Park and Horseshoe Park. Best time to view: dawn and dusk. This is also when aspens turn — the c