Budget
Boulder International Hostel
Boulder International Hostel, 1107 12th Street, 303 442-0522, (http://boulderhostel.com/). The cheapest place to stay in Boulder, just two blocks off the University campus and adjacent to University Hill. The hostel offers both dorm and private rooms, and caters to out-of-state and foreign travelers. It has spartan rooms but friendly people.
Boulder University Inn
Boulder University Inn , 1632 Broadway, 303 417-1700, (http://boulderuniversityi...). The most affordable downtown lodging option. It is one of three hotels officially located downtown- the other two are upscale establishments Boulderado and St Julien. Rooms are clean and spacious. Has wireless internet, a business center, and an outdoor swimming pool. Easy walk to the University and downtown's Pearl St.
Rodeway Inn & Suites
Rodeway Inn & Suites, 555 30th Street, 303 444-3330, (http://rodewayinn.com/ire...). Within walking distance of The University of Colorado at Boulder, this hotel offers amenities for business travelers and vacationers alike.
Top end
Alps Boulder Canyon Inn
This historic 1870's mansion/castle was originally built of local stone and log construction. The Alps is now luxurious and completly remodeled into an award winning three-star bed and breakfast country inn (http://alpsinn.com/rm211.htm). The Inn is located just 5 min. from downtown Boulder in scenic Boulder Canyon surrounded by City of Boulder mountain parks and sits across from Boulder creek. Perfect for romantic getaways, outdoor enthusiasts, special occasions, parties, weddings (http://alpsweddings.com/) and ceremonies. The Alps offers complimentary gourmet breakfast, afternoon tea, evening desserts, high-speed internet, local and domestic long-distance calling.
Hotel Boulderado
Hotel Boulderado, 2115 Thirteenth Street, 303 442-4344, (http://boulderado.com/). A three-star getaway located one block off the Pearl Street Mall, with easy downtown access. Everything is within a five minute walk and you don't even need to worry about finding a parking place.
St. Julien Hotel
St. Julien Hotel, 900 Walnut Street, 720-406-9696, (http://stjulien.com/). This new three-star hotel is the luxury experience in downtown Boulder. Located at 9th and Walnut streets, the St. Julien offers everything you could desire while only being three blocks from the Pearl Street Mall.
Moderate
Briar Rose Bed and Breakfast
Briar Rose Bed and Breakfast, 2151 Arapahoe Avenue, 303-442-3007, (http://BriarRoseBB.com/). Bed and breakfast in the heart of Boulder offers organic breakfast, fine teas, private baths and ecologically-conscious hospitality. Walk to C.U., Naropa, Pearl Street and the 29th Street Mall.
Best Western Plus Boulder Inn
Best Western Plus Boulder Inn, 770 28th Street, 303-449-3800, (http://boulderinn.com/). Prominently located directly across from the University, the Boulder Inn gives guests easy access to Boulder's principal attractions, NIST, NOAA, premier shopping, and extraordinary dining. Stylish, well-appointed rooms reflect a gracious ambiance, found throughout the hotel.
Boulder Outlook Hotel
Boulder Outlook Hotel, 800 28th Street, 303-443-3322, (http://boulderoutlook.com/). This new hotel is located adjacent to the University of Colorado at Boulder, and is the quintessential Boulder hotel experience. They have a black lagoon pool and a rock climbing area indoors. They even allow you to bring your dog along to stay with you.
Housing Helpers
2865 baseline road, 303-545-6000, (http://housinghelpers.com/). offers high quality executive rental apartments and homes backed by superior customer service. housing helpers corporate rentals are more comfortable, convenient and affordable than a hotel.
Quality Inn & Suites CU Boulder
2020 arapahoe ave, 303-449-7550, (http://qualityinn.com/ire...). located in the heart of downtown boulder, this hotel is walking distance to the university of colorado, boulder, and minutes away from the pearl street mall