Inspiration Point is a nice little 3.75-mile hike (via the Tunnel Trail) in the Santa Ynez Mountains of Santy B. On clear days (most days), you can see the Channel Islands as you look to the south.
The viewpoint (of inspiration!) is at 1,800 feet, and the trail gains a total of 800 as you go along.
It’s a very popular hike, so it can be a little congested (with music-blasting types :O), but not so much if it threatens to rain. After heavy rains, there’s plenty of evidence of micro mudslides and rockslides, particularly at the sandstone walls.
There are connector trails along the way to an area called Seven Falls, but it was so devastatingly dry while I was there that there were definitely no falls.