We just came back from a tour to Boulder and it was amazing! We are from Chicago and booked this trip when planning our Denver vacation. Jem and Win really made our experience special. We took the 4 hr. trip which included a hike to the Flat Irons and a visit to Pearl Street. They even bought our first beer. From the time we got picked up in the very comfortable and roomy conversion van, to the time we got dropped off, our guides were professional and friendly and made us feel special. They were both in tune to the fact that some people acclimate to elevation and altitude in different ways and made the hike more enjoyable for us. Depending on the size of your group, and your interests, they will customize your experience for you.