The 2025 Lyons Lake Kids Trout Derby, hosted by the Grass Valley Sportsmen's Club, is scheduled for Saturday, April 19, 2025, at Lyons Lake within the Nevada County Fairgrounds in Grass Valley, California. This free event welcomes children aged 3 to 12, with sign-in starting at 7:00 AM and the derby running from 8:00 AM to 12:00 PM. Participants are required to bring their own fishing equipment and adhere to a three-fish limit. Age groups are divided into 3–6, 7–9, and 10–12 years for prize eligibility.

This annual derby aims to foster a love for fishing and the outdoors among young anglers in a fun, family-friendly environment.