Schedule and Arrangements


COLT 2021 will be a hybrid conference with both virtual and in-person components.

Authors will contribute a recorded talk, participate in a virtual poster session, and contribute a recorded lightning talk with live Q&A.

Plenary, invited, and lightning talks will be live-streamed synchronously, along with Q&A from virtual and in-person participants. Authors may conduct their Q&A locally or remotely.

The conference will include opportunities for: experts to engage including poster sessions, recorded talks, Q&A, and informal discussions; showcasing the breadth of research in the community with proceedings and plenary talks; and community connection and socializing in both virtual and physical spaces.


Wednesday, August 4 - Thursday, August 5 (tentative):

Sunday, August 15

Monday, August 16 - Thursday, August 19

Sample daily schedule (U.S. Mountain Standard Time, UTC-06:00); details subject to change:

COVID-19 Precautions

We are putting the following precautions in place for the health and enjoyment of local participants as well as staff and volunteers:

  • All local attendees will affirm that they are fully vaccinated prior to attending. We ask non-vaccinated members of the community to join the virtual experience.
  • Local attendance will be capped at 200 people, perhaps fewer. In particular, the auditoriums will be at no more than half their seating capacity.
  • All meals and breaks will be outdoors.
  • We are working to provide live viewing screens outdoors. Any participant is welcome to watch any talk from the outdoor area if they prefer.
  • Poster sessions will be virtual-only. Local attendees will participate from their hotels/accommodations in the morning before coming to the venue for talks and outdoor socializing. We are working to have technology or assistance available for anyone who might need it for the virtual poster sessions.
  • Afternoon social activities such as discussions or roundtables will take place partially or entirely outdoors in the tent.

You can also find information about local COVID-19 status. Boulder county currently (June 2021) has one of the highest vaccination rates in the U.S.

Travel, Accommodations, and Local Information

Travel. Flights are typically booked to Denver International Airport, from which it is about a one-hour bus ride to downtown Boulder. When arriving at the airport, go out the south end of the terminal (a main exit) and down the long escalator, purchase a ticket for $10.50 at a kiosk, and catch either the AB1 or AB2 bus that comes every hour until 11pm.

Accommodations. We will be posting information about local hotel blocks and special rates soon (early June). Because August 15-19 overlaps with the university students' move-in week, we recommend booking accommodation in advance. Unfortunately, hotel prices will be higher than normal. AirBnB is also a common option in Boulder.

Local tips.

  • Altitude. Boulder, Colorado is about 5400 feet (1650 meters) above sea level, a moderate but noticeable elevation. You can minimize the impact by staying hydrated; more information here.
  • Weather. Boulder in the summer generally has cool nights (50F - 65F; 10C - 18C) and dry, hot days (75F - 95F; 24C - 34C), with very strong sun (due to the altitude) and common but short-lived afternoon rain storms. Sunglasses and sunscreen are recommended for spending significant time outdoors not under cover. (The conference will have a tent for our outdoor activities to provide shade and rain protection.)
  • Outdoor activities. Boulder is known for its beautiful hikes, accessible within only a couple miles from the university campus. The city also has many biking and running paths; venture a few miles from downtown and you will encounter herds of cows and colonies of prairie dogs.
  • Other activities. Boulder and the Denver area also have fun and COVID-safe opportunities such as music and outdoor restaurants. Denver is accessible by a bus ride of an hour each way.