Here's what Boulder OSMP has to say about Halfway House: 

" The Halfway House is an enclosed stone facility that is available by reservation for groups of up to 49 people. Originally known as the Panorama Park Shelter House, the facility was rebuilt in 1933 by the Civilian Conservation Corps, replacing a structure that was originally built by the Lions Club in 1919. The Halfway House is a popular location for weddings and picnics and has a lovely stone patio that affords magnificent views of the Boulder Valley. The inside has covered seating for approximately 40 people. 

Halfway House is located up Flagstaff Road in Boulder. Here is a Google map pin that will take you to the parking area. 

You are required to reserve Halfway House for ceremonies. Here is more information on reserving the site.

Pets are permitted at Halfway House but must be on a leash unless they are participants of the Voice and Sight Control Program.

Halfway House is open year-round except from Veteran's Day through New Years Day. You can expect similar weather at Halfway House as Boulder. 

Halfway House is easily accessible with a short walk from the parking lot. The patio is wheelchair accessible via a short trail from the parking area.

There is a small parking area at Halfway House. You may consider hiring transportation depending on your guest count.