Colorado's San Juan Skyway

Stop just south of Dolores at the Anasazi Heritage Center ($3), a museum operated by the Bureau of Land Management. It preserves hundreds of clay pots, yucca-fiber sandals, and other artifacts collected from Anasazi villages.

Now on to Mesa Verde National Park ($10 per car). Steep switchbacks climb from the Montezuma Valley to the top of the green mesa at about 8,500 feet. This was home to many Ancestral Puebloans from about a.d. 550 to a.d. 1300. Surely they were as awed by the distant views from this elevated perch as I always am.

The two most impressive ruins are Cliff Palace and Balcony House. To see them, you have to join a ranger-led tour. Tickets for each cost $2.50 at the Far View Visitor Center. Getting in and out of both requires some agility and no fear of heights. The Ancestral Puebloans built their lodgings in nearly inaccessible cave-like ledges on the sides of high cliffs for protection from their enemies. To reach them, tourists do as the Ancestral Puebloans did.

Stone steps cut into the side of a canyon wall descend through a narrow crevice to the floor of Cliff Palace, the largest cliff dwelling in North America. Once it housed 200 people in more than 100 rooms but was vacated in the fourteenth century, perhaps because of prolonged drought. Exiting is a similar scramble. You edge up stone steps through another tight crevice, and then you climb a series of two 10-foot-tall ladders placed one atop the other up the canyon wall. Don't look down.

No tickets are required for a look at Spruce Tree House, which is considered the park's best-preserved cliff dwelling. But you do have to negotiate a steep path down and up. The third largest of Mesa Verde's cliff dwellings, it contains about 100 rooms and eight ceremonial chambers called kivas-a sort of cylindrical pit. You can descend by ladder into one of the kivas.

I like to stay at the park's mesa-top Far View Lodge, which is well named. From my balcony, I watch the lights pop on at scattered ranch houses in the valley far below. On one visit, deer browsed outside my balcony. This time, a pair of wild horses meandered past.

Details

From Grand Junction, take U.S. 50 southeast via Delta to Montrose. Continue south on U.S. 550 to Ridgway, connecting to Colorado Route 62 west to Placerville. Head southeast on Colorado 145 to Telluride. Pick up Colorado 145 again and angle southwest to Cortez. Take U.S. 160 east to Mesa Verde. For a scenic splurge, stay in Mesa Verde at the 115-room Far View Lodge (800/449-2288), $102 to $134. Dine at the Far View Terrace Food Court, a cafeteria. If Far View is out of your price range, stay in Cortez at the 85-room Days Inn (970/565-8577), $60 to $70; or the 58-room Super 8 (970/565-8888), $75. Information: 800/253-1616, www.mesaverdecountry.com.

Boomtown days

Day three

Mesa Verde via Durango, Silverton, and Ouray to Montrose, 160 miles. Spend the morning exploring more of Mesa Verde before heading back into the San Juans. From Durango, the road climbs quickly to Coal Bank Pass at 10,660 feet. Even in midsummer, the air can be chilly. Ahead the cliff's-edge road crests 10,899-foot Molas Pass. On the descent, you can see Silverton far below, set in a small, bowl-like valley.

Once a rowdy boomtown of bars and brothels, the old silver-mining town of Silverton (elevation 9,318 feet) seems rather sedate these days, although it still retains a rough frontier look. Swirls of dust, kicked up by frosty breezes, whip across the unpaved side streets, and Victorian-era wood and brick buildings-housing shops and caf,s-possess a properly weathered look. Overhead, the treeless summits of craggy peaks snag passing clouds.