There's plenty to do in the nearby areas. But water sports and fishing take the prize! 1 mile north of the Tagish Holiday Park, just near the Tagish Bridge, you will find public access to the Tagish River. From there you can go north to the Marsh Lake or south to the Tagish Lake. Or just stay on the Tagish River.
Plenty of fish will be found in the lakes and rivers. You will find Lake Trouts, Northern Pikes and more! Take a look ate the Yukon fishing guide for more details. And don't forget to get your permits before going fishing!
Just take your canoe or kayak to the shore by the Tagish bridge and enjoy the beautiful sightseeing that the Southern Lakes offer to travelers. Or you can just take a dive and swim in the calm river.