The steelhead are sea-run Rainbow trout. In fall and early winter they move back up the Thompson to spawn. During their stay in the ocean, they gorge themself on anchovies, herring, shrimp and other delicacies and in turn put on a lot of weight. Bigger steelhead can weigh more than 30 pounds but the average is 15-20 pounds.
Rafters come to the Thompson to challenge its many rapids and canyons. Just downstream from Spences Bridge in the middle of the river is a huge boulder. At low water the tip of the boulder sits about 20 feet or more above the water, but at high water it can be almost submerged. You can put in at Savona where the Thompson leaves Kamloops Lake. Savona is also a prime spot for Steelhead fishing.