June 6-7, 2026
Alamosa, CO

In an effort to enhance two treasured community events; Summerfest on the Rio is joining forces with the Rio Trio Triathlon to create an even bigger community celebration and will now be known as RioFest! This celebration of music, arts & crafts and outdoor recreation will all be on the traditional Summerfest date of the first full weekend in June at Cole Park in Alamosa.

As we work through this transition, vendor applications and event information are being formulated now and will be announced as soon as possible. Previous years vendors will be notified when operations are up and running. All new and updated RioFest information will be available on the City of Alamosa Parks and Recreation webpage, alamosarec.org. Thank you for your continued support and get ready for RioFest 2026!

Welcome to SummerFest on the Rio, the San Luis Valley’s way of kicking off summertime fun. This annual festival depicts extensive arts and craft talents, musical entertainment for the entire family, and a multitude of activities for the kids. Walk along the winding Rio Grande in the beautiful spacious Cole Park while contemplating something from a large variety of food and drink.

The festival takes place the first weekend in June each year. Everyone is ready to go Friday at 4:00 p.m. The food and beer garden gear up for the SummerFest’s signature concerts in the park from 4:00-9:30 p.m.

Saturday proves to be a big hit with the families. Vendors are all set to go at 10:00 a.m. looking forward to the community interaction. Multiple musical genres are represented on stage at the north end of the park. Music starts at 10:00 a.m. and a final amazing act winds it down by 9:30 p.m.

There is no admission to the public for this event! Sponsorships and donations help support and grow this festival. Please review our sponsorship information if you are interested in being a part of the SummerFest community. We are a 501(c)3 so your contribution may be tax deductible.

Pets must be leashed and picked up after. Bicycles must be pushed through the park.

Keep in mind that all of our staff is volunteering his/her time. Please thank them as you see them throughout the weekend. It is very important for the community to get involved in this event. Without volunteers this and other community events will eventually not exist. Please consider participating as a volunteer, please email your information to .