Lights strung behind massive pillars of ice at an old quarry in Minnesota make these frozen waterfalls glow.

You may have seen our post last year, “Lights installed behind frozen waterfall for Trippy scene.” Well, the Minnesota climbing crew is at it again.

This past weekend was the third annual PeterFest, a gathering created by Twin Cities climber Peter Lenz.

Held at the Sandstone Ice Park the fest raises money for local climbing projects and features day and night ascents.

The images here reveal massive frozen ice climbs lit with gelled lights to create, as we noted last year, quite a trippy scene.

Wrote Sean Foster, a climber and the photographer who took many of these shots, “Jeff Engel and Lynn Larson, along with others, installed 70+ ft long strands of lights connected to a timing system and set to turn on for 2 hrs per day, 5 days per week.”

Foster continued, “Aside from being fun to climb on, city residents also make their way down to the park to delight in the beautiful display.” —Stephen Regenold

—See more images from the ice fest at the Just Climb MN blog.