To get there, follow Highway 33 north of Ojai for 14.7 miles to the Rose Valley Road turnoff (6N31) which is at mile marker 25.84. Turn right and follow the paved road 4.8 miles. Turn right and go 0.8 miles to Middle Lion Campground.
I camp here quite often, especially during the spring and fall (and winter for some cold weather fun). Its a small site with eight sites with a fire pit and table for each. There is a vault toilet but no drinking water, so bring your own or filter from the stream at the bottom of the site.
You will need an adventure pass ($5 daily or $30 for the year, tip, If you know someone else who needs a pass get one and spend the additional $5 for a second vehicle pass and split the $35 fee between the two of you), which you can get at the ranger station in Ojai, or more conveniently at the REI store (2700 Seaglass Way, Oxnard, CA 93036) just off the 101.
This is a great little stopping point as you are at the beginning of one of the best riding roads in the state! The 33 is an incredible road which has very little traffic during the week, great corners and amazing vistas. Be warned that especially during the week ends you will find the Highway Patrol out and about ticketing speeders. The site itself is great, there are plenty of trees, there is a small river which runs through the bottom of the camp ground and there are some great hikes starting close by. (the Sespe River Trail (20W13) is great as there are some swimming holes which in the summer are very welcome).
The 6N31 road is paved, but for only 3/4 of the way with the rest being gravel.
Cheep as you only need a daily or adventure pass.
Small, only 8 sites.
No drinking water available.