Took my 4 year old on his first real hike
We did a 2 mile loop at a local nature preserve and I was sweating bullets the whole time worried he'd get tired and I'd have to carry him. But he absolutely crushed it, found 3 different bugs, a creek to splash in, and only complained for like the last quarter mile. He kept saying 'dad I'm a real hiker now' the whole drive home. Highly recommend if your kid is around that age. Pick something short and interesting.
This is awesome. We've done 12 national parks so far and every single one started with that same worry. You're building a memory he'll remember forever though. Those first hikes hit different.