I spent last Saturday trudging through the wilderness of back bay in Newport Beach. It is a really nice place to go and spend an afternoon if the weather is right. The upper part is great this time of year with some good trails and a ton of nice flowers. There are humming birds buzzing all over and you can usually see a fair amount of hawks hovering around and hunting the millions of rabbits that live there. Occasionally you can catch a glimpse of some burrowing owls who live there also.
The lower part can get pretty mucky but is work a little hike. There are a ton of march birds and lots of butterflies that wander a midst the reeds and bullrush down by the water.