Hotel
This is a little outside of Boulder but a quite nice hotel with mountain views. Use this link to book under our room block at $139/night before September 20.
House Or Rental
There are a lot of great Airbnbs in the area, especially for couples or smaller groups.
Flight
DIA is about 45 minutes drive away (from everything). Uber and Lyft are readily available onsite, and the AB1/AB2 bus runs hourly to Boulder for $10.50 and handles your luggage for you: https://www.rtd-denver.com/services/airport
Rental Car
We have heard there is a rental car shortage this year, so if you plan on renting one we recommend doing so early. Local buses and Uber/Lyft are also available.