Travel & Transportation

Online Hotel Reservation Booking is closed.

National Center for Atmospheric Research

3080 Center Green Drive, Boulder, CO, United States
National Center for Atmospheric Research

Millennium Harvest House Boulder is the host hotel for this Congress. Conveniently located only minutes from Downtown Boulder, 3.2 miles from the Boulder Municipal Airport and 42.2 miles from Denver International Aiport. Set amid 16 acres of beautiful landscaped grounds in the heart of this popular college town, Millennium Harvest House Boulder is the perfect getaway hotel in any season. This convenient hotel offers 3 restaurants, complimentary parking, laundry facilities and onsite tennis. Nearby are miles of scenic hiking and biking trails, world-class ski slopes, great shopping, and the University of Colorado.

The OSA Light, Energy and the Environment Congress management will offer shuttles to and from NCAR, the location of the Congress. 

The hotel is accepting reservation for Congress attendees until 1 November based on avalible space.

Millennium Harvest House Boulder hotel rates will be honored 3 days prior and 3 days post conference dates, based on hotel room availability.

The hotel is still accepting reservation based on avalible space.
Room Type   Room Charge
Single/Double USD $109.00
Extra Person USD $10.00 each
City Tax 12.485 (taxes are subject to change)

Book within the block to enjoy

  • Complimentary wireless internet access in your sleeping room
  • Daily Complimentary bottled water in your sleeping room
  • Complimentary self-parking
  • Earn Loyalty Points

Millennium Harvest House Boulder
The hotel is still accepting reservation based on avalible space.

1.Book Online - Make, Modify and/or Cancel your hotel reservation online.
2. Call: 1-866-866-8086 or +1 303-443-3850 then select option #1 and request group name: 2017 Light, Energy and the Environment Congress.

Check-In: 16:00
Check Out: 11:00, will extend to 13:00 upon request, at no additional charge.

All reservations must be guaranteed with a major credit card. Participants will not be charged for his or her entire stay until time of departure. The hotel will put a hold on the credit card for the estimated charges and $50 per night for incidentals.  Attendee deposits are fully refundable only if reservations are cancelled with Hotel at least 72 hours prior to scheduled arrival. In the event of a no-show, a one-night guarantee will be charged, and the room will be cancelled and released for resale by the hotel.

Visa Information

Apply now for your US Visa

If you need a travel visa, begin the visa application process now! The application process can take up to 6 months or more. We strongly encourage you to apply for your visa as early as possible, but no later than three months before you wish to enter the United States. Strict security requirements may cause delays in visa processing. More information about applying for a United States visa is available at U.S. VISAs.
Online Resources:
U.S. Customs and Border Information
VWP and ESTA Frequently Asked Questions
U.S. State Department Visa Information
Department of Homeland Security
National Academies International Visitors Office
ESTA Application
ESTA is an automated system that determines the eligibility of visitors to travel to the United States under the Visa Waiver Program (VWP). Authorization via ESTA does not determine whether a traveler is admissible to the United States. U.S. Customs and Border Protection officers determine admissibility upon travelers’ arrival. The ESTA application collects biographic information and answers to VWP eligibility questions. ESTA applications may be submitted at any time prior to travel, though it is recommended that travelers apply as soon as they begin preparing travel plans or prior to purchasing airline tickets.

Letters of Invitation

Individuals requiring letters of invitation to obtain travel visas may access the online form at Invitation Letter Request Form.

Important information regarding Visa Invitation Letters:
  • Your name must be listed exactly as it appears on your passport. Any differences between the name on your passport and the name on your invitation letter or other documentation could lead to a delay and/or denial of your visa.
  • If you are presenting a paper, include the title and session in which the paper will be presented.
  • Please note that each individual requesting an invitation letter must fill out a separate form.
  • All letters of invitation will be sent by a locked PDF unless otherwise requested. If you require a paper copy please provide a courier account number or credit card number with expiration date with the original request.
  • Please allow up to 15 business days to process your request.
  • OSA Management reserves the right to request further information regarding the company or affiliation of the attendee to ensure the validity of requests. Meeting attendees do not need to wait until your paper is accepted to request a Visa Invitation Letter.
  • OSA is unable to contact U.S. Embassies in support of an individual attempting to gain entry to attend a meeting.
  • We recommend that you secure your travel visa before registering for the conference as cancellations after the preregistration cutoff may result in a cancellation fee.

For questions about the Visa Invitation Letter application process, email

Travel by Air

The Millennium Harvest House Boulder hotel is located just 42 miles from the Denver International Airport.

Transportation From Airport

Shared-Ride Services
Shared-ride service, also known as commuter shuttles, operate regularly from Denver International Airport. Individual operators may provide pre-arranged, on-demand, and/or charter services to locations within the Denver metro area and the state of Colorado. Shared-ride service shuttles pick-up and drop-off from Jeppesen Terminal Level 5, island 5, outside doors 505-507 (east side) and 510-512 (west side).

Green Ride Boulder is a shared ride service to/from Denver International Airport. OSA Congress attendees can receive the special rate of $30USD each way by making a reservation through the special link.  

Regional Bus
The AB SkyRide provides bus service between downtown Boulder and the Denver Airport Station for $9 each way. You can find the bus at Gate 6 at the Denver Airport and it will take you to the Downtown Boulder Stations, which is close to the hotel. 

Taxi Cabs
Taxicabs are readily available at the Denver Airport. Taxicabs pick-up and drop-off from Jeppesen Terminal, Level 5, Island 1, outside Doors 505, 507 and 511 (Terminal East), and Doors 506, 510 and 512 (Terminal West). Flat Rate Charges of $88.57 to the Boulder area.  

Rental Cars
Denver International Airport has over than 10 major rental car companies. The shuttles pick-up and drop-off from Jeppesen Terminal Level 5, Island 4, outside doors 505-513 (east side) and 504-512 (west side).
Light, Energy and the Environment attendees get a special discount with Avis. Visit their website to reserve your car.