Colorado Springs Airport (COS) is the closest.
Denver International (DIA) is 90 minutes away.
There are several shuttle options should you not wish to rent a car.
https://groometransportation.com/colorado-springs/
Hotel
The Mining Exchange, A Wyndham Grand Hotel & Spa
8 South Nevada Avenue Colorado Springs, CO 80903 (719) 323-2000
Hotel
The Antlers, A Wyndham Hotel
4 South Cascade Avenue Colorado Springs, CO 80903 (719) 955-5600