Parking for this area is up Owsley Canyon, follow the signs to the trailhead.
I like to ride #724 Mera Loop with the #700 Green Apple trail. Generally, I start counter clockwise on #700 Green Apple. Just look for the opening in the fence just to the left of the entrance.
Mera does have quite a confusing trail network, but it's getting pretty well signed - for now, just use the MTB Project mobile app
The Mera Loop is mostly smooth and fast with some good flow in the downhill sections. You can ride these trails on a hardtail or on a plush trail bike and it's fun every time.
This loop is a great stop when traveling the freeway.