SUNDAY'S Gaden Trout Hatchery opening day saw hundreds of community members and visitors flock to the Thredbo River to celebrate the new facility, which will open its doors later this year.

Hosting community market stalls along the river as well as facility tours, fly fishing demonstrations and fishing workshops the hatchery saw around 700 people register to take part in the days tour events, and hundreds more exploring the market range.

The newly $8.6 million upgrades closed the facility for more than 12 months and the opening day has excited the community to learn about the upgrades and what it means for the regions trout programs.