Just because Boulder, Colorado, is the capital of casual doesn’t mean it can’t be elegant, too. Consider the St. Julien Hotel & Spa. It’s Boulder’s first downtown luxury hotel and spa (built in 1909), and it offers all the comforts of a grand property without any of the stuffiness. The 10,000-square-foot spa is fully loaded — with a lap pool, cutting edge fitness equipment, and relaxing treatment rooms, steam baths, and saunas — and all 200 guestrooms have generous bathrooms, soaking tubs, seamless glass showers, and high-speed Inter­net for business travelers. The St. Julien is also a short stroll from the pedestrian-only Pearl Street shopping district — an easygoing way to wind down your day. $165-$600. (720) 406-9696, www.stjulien.com