Downtown Newport Beach
As mentioned in the last POI, Newport Beach is a great place for renting bikes, surreys, and other modes of trail transportation. It also makes a great place to eat breakfast, lunch, dinner, or a bodacious snack. As if all that isn't enough, you'll likely enjoy just browsing around, shopping for souvenirs, and savoring the one-of-a-kind shops located here.
The one downside to Newport Beach is the lack of affordable parking. There are a couple all-day parking areas/structures in the $15 range. Hourly and metered parking is quite expensive and often limited to a couple hours. Although free neighborhood may be available on weekdays during the off-season, it's almost non-existent in the peak season and during weekends.
One inexpensive option for renting a bike is from Dale at Back Alley Bikes. Dale offers a cruiser bike rental for $10 for the entire day.
If you are hungry before or after your bike trip, there are a number of great dining options. One restaurant that is less than a block off the trail is Great Mex. It has excellent shrimp tacos and carne asada for a reasonable (comparatively speaking) price. Taco Tuesdays are especially reasonable with specials on most of their scrumptious tacos. This place is definitely a local favorite judging by the daily lines out the door. It ain't fancy, but it sure is good.