The Fairfax County Park Authority is offering a free scavenger hunt with video clues in the Cub Run Stream Valley. Called the Snowflake Trail, it opened Dec. 18 and will remain marked through Jan. 11.

According to the story, Grandmother Frost has lost her gifts for the woodland animals, and participants must help her find the presents while walking through the forest behind the Cub Run RECenter. Videos at stops along the trail lead to the goal and teach children about the animals in the woods.

Visitors scan QR codes with a smartphone to learn the gifts the animals are receiving. Snowflake markers along the path guide participants to each clue. The Snowflake Trail starts at a kiosk at the Cub Run RECenter circle. across from the center’s main entrance at 4630 Stonecroft Blvd, in Chantilly.

It follows a loop trail through forest and other habitats back to the center’s parking area. The trail, on both paved and mulched surfaces, is less than a mile long. No RECenter entry pass is needed to participate.

Parking is available in the RECenter’s parking lot. An introductory video is available online at https://youtu.be/LSsFFHnMOEs.