L. K.
Yelp
This beach is my favorite in P-town for one reason: Hatches Harbor.
I don't often venture to the left side (virtually all adults, mostly gay guys). One thing I will mention about the left is that you can walk through the moors and get all the way back to the town, if you wish, which is kind of cool.
If you go to the right, past all the lesbians, straight people, and RVs, you can find a relatively quiet area. And from there, I walk even farther down the beach to Hatches Harbor, about a twenty to thirty minute walk that gets people-free very early on.
What is Hatches Harbor? It's an area that's full of essentially small, shallow pools at low tide, but fills up to huge ponds and barely a sandbar left to walk on during high tide. Nesting seagulls, pretty shells and rocks, minnows and crabs, beach plums, and no people? It's the place for me.
Walk even further and you could get all the way to the lighthouse! My suggestion: bring a full fresh water bottle.
Other notes: Non-New Englanders have reported this beach being very rocky for their taste. I didn't notice a difference. The water is always warmer than Race Point. There's a recently renovated pavilion with a snack bar, etc. by the parking lot, but I bring my own food (cheaper). Dogs are allowed. This is a good beach for kids.