Transportation

First and most importantly, getting to Boulder from Denver International Airport, there are two options:

1. RTD Bus (recommended option):

The RTD bus line "AB1" runs frequently from Denver International Airport to the city of Boulder - follow the signs to public transportation, take the long escalator down to the train and bus terminal from the south end of the terminal.  Click here for the bus schedule.  The one-way fare is $10; you must have exact change, or you can buy a ticket using one of the RTD machines in the bus loading area, or use the RTD app.  You should ride to the "Broadway/Table Mesa" stop, which is about a 15 minute walk from Williams Village.  You can also connect from the "Broadway/Euclid" stop to the 225 local bus, which will take you directly to Williams Village (the closest stop is Baseline/35th.)  Your airport ticket will let you ride other local buses for the day.

(There is also a train stop at Denver Airport, but that will take you to Denver Union Station, and there is no train connection from Denver to Boulder currently so you'll have to take a bus from Denver anyway.  Just take the AB1 bus.)

2. Airport Shuttle:

Eight Black Airport Shuttle (formerly Green Ride) offers door-to-door transport to and from the airport.  Visit their website for more details and to make a reservation.

Once you are here, for getting around the city of Boulder, there are several bus lines that run frequently.  See this page for a brief guide.  For convenient travel to the city of Denver, the Flatiron Flyer (FF) bus service is a good option - route FF1 runs from downtown Boulder to downtown Denver.  If you need a car for a few hours, eGo CarShare or ZipCar are both available on the CU campus.

If you're interested in getting around by bicycle instead, Boulder BCycle is a bike-sharing program with several stations on and around campus.   You may also be able to rent a bicycle from one of the many local outdoor supply companies; try REI or Christy Sports.  You'll also find Lime E-scooters available around Boulder, including on campus.

Parking

TASI students can purchase a month long parking permit by calling Parking at (303) 735-7275. The price would be around $60 for the month.  The parking office is open M-F; if you arrive over the weekend, purchase a short-term pass by following the instructions at https://www.colorado.edu/pts/short-term-parking/dailyweekly-parking.

In Boulder

The University of Colorado Boulder campus is located in Boulder, Colorado, nestled at the foot of the Rocky Mountains at a height of 5400 feet (1650 m) above sea level.  The weather during June is typically very pleasant, with a temperature range of 55°F to 85°F (13°C to 29°C) during the day and low humidity.  Thunderstorms in the afternoon are common (but usually very brief) - you may want to bring an umbrella.  Temperatures can be significantly lower at night, so you should bring a sweater or jacket.

There are many opportunities for outdoor recreation in the Boulder area, including a number of hiking trails.  Note that hiking in the mountains requires a good pair of hiking shoes and warm clothing, as there will be snow on the hiking trails even in June at higher elevations.  There are also many cultural activities in Boulder and more in Denver.

For more information on hiking in the Boulder area, see the Hiking Guide.  If you're interested in bike rides, Jim Cline put together a nice guide as part of his TASI 2018 lecture notes on early universe cosmology (see appendix A.)  Finally, for a list of places to eat and drink and other things to do in Boulder, see the Local Guide (compiled by CU's high-energy theory grad students.)

An interactive map of the CU Boulder campus is available here: https://www.colorado.edu/map/ 

Housing and Dining

All participants will be expected to stay in the Williams Village (Will Vill) dorm adjacent to the University of Colorado campus, located at:

3300 Baseline Rd.
Boulder, CO 80303
Front desk phone: (303) 735-1445

Will Vill is about a 25-30 minute walk from the Duane Physics building on campus.  Check-in will be at the Will Vill front desk starting at 3 PM on June 1, 2025 and is available 24 hours a day for later arrivals.  Accommodations will be either single or double rooms in Will Vill, with communal bathrooms.  Linens (bedding and towels) will be provided on arrival; you will need to wash them yourselves.   There are laundry facilities available - bring your own laundry detergent.

Food services are provided at Village Center Dining at Williams Village (breakfast and dinner) and at Alferd Packer Grill in the University Memorial Center (lunch). All-you-can-eat meal cards are provided for the duration of TASI as part of your housing costs.

Packages and mail

Please let us know by telling our administrators during coffee breaks, or emailing TASI@colorado.edu if you need a package delivered. Conference services has asked that packages do not be delivered to the dorms.

Health and Safety

The facilities below may be considered an out-of-network provider for most insurance plans, so it is highly encouraged to contact your insurance provider for clarification. A detailed billing statement can be provided for those seeking reimbursement from their insurance provider.

Urgent Care - Walk-in facilities

1) Boulder Medical Center

2750 Broadway

Boulder, CO 80304

303-440-3000

Mon-Fri: 8AM-7PM

Sat-Sun: 9AM-5PM

2) AFC Urgent Care Boulder

2795 Pearl St. #106

Boulder, CO 80302

720-961-9700

Mon-Fri: 8AM-8PM

Sat-Sun: 8AM-5PM

Emergency Numbers and Safety 

Fire/Police/Sheriff/Ambulance 911

Non-Emergency Campus Police 303-492-6666

Reimbursement (lecturers only)

For all lecturers: giving us your information promptly and completely will avoid long delays in sending the reimbursements back to you!

For all U.S. based lecturers:

Send an e-mail to tasi@colorado.edu with the following information:

• Full Name for the check 

• HOME mailing address (no university or business addresses allowed)  

• Airline receipt for inbound and outbound flights - must show the dates of travel, name of payer and the method of payment  

• If you drove instead of taking a flight, tell us where you drove from (point of origin)

• Receipts for any other transportation expenses 

For international lecturers:

In addition to all of the information in the list above, please provide:

• A copy of your passport bio page and U.S. visa entry;

• A prepared W-8 BEN tax form (see guidelines here.)