This was a Sid and Marty Krofft live action children's television series from the seventies about about an orphan who was raised in the wilderness of the Pacific Northwest by the legendary Sasquatch. The episodes take place years later, as Bigfoot and Wildboy roam the countryside encountering other strange creatures, fighting pollution, capturing diabolical villains, and rescuing those in distress.

This show is total cheese. Bigfoot (who looks like he could be Chewbacca's cousin) is frequently shown running, jumping, throwing papier-mâché boulders, and performing other "incredible" physical feats, almost always in slow motion (a la The Six Million Dollar Man). There's also a bird that "talks" (like Lassie the dog "talks") to Wildboy, and a Native American girl who just hangs around for some reason. The budget for this must have been next to nothing, because everything looks cheap, including the costumes and sets. It's incredibly goofy and fun to watch, though, especially all these years later.

Here's the intro:
https://www.youtube.com/watch?v=-NNb1pgQlQo