In the summertime, Dalton Highway traffic is brisk with folks visiting Fairbanks who want to cross over the Arctic Circle. Northern Alaska Tour Company has a fleet of vans and coaches for folks who want to make the day-long journey by road. And it's a long day: leaving early in the morning and getting back to Fairbanks between 10 p.m. and midnight, depending on road conditions.

There are plenty of stops along the way to get an up-close look at the trans-Alaska pipeline, walk on the tundra, share a meal at the company's "Yukon River Camp" just past the Yukon River bridge. The Yukon River crossing was built for the pipeline. It's the only bridge across the river in Alaska -- and it's a doozy: a half-mile long, at a 7 percent grade. Then there is the obligatory photo-op at the Arctic Circle itself.

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