Length: About 110 miles.
When to go: Trail Ridge Road is open May to October, weather permitting; other roads are open year-round.
Fuel and lodging: No fuel or indoor overnight accommodations are available in the park.
Words to the wise: Beware of lightning along Trail Ridge Road.
Nearby attractions: Bear Lake Road and Moraine Park (in Rocky Mountain National Park).
Visitor centers: Alpine, Estes Park, Beaver Meadows, Kawuneeche.
Further information: Rocky Mountain National Park, Estes Park, CO 80517; tel. 970-586-1206,www.nps.gov/romo/.
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