trail running


mountain biking


wild flowers




nature trips

no dogs


kid friendly

dogs on leash

Annadel State Park, located 60 miles north of San Francisco on the eastern edge of Santa Rosa, offers miles of trails for hiking, mountain biking, and trail riding. For wildflower lovers, Annadel Park offers a great variety of flowers from early Spring until early Summer, especially on a hike around Lake Ilsanjo. The best months to see the park's wildflowers are April and May, but there are some plants in bloom as early as January and as late as September. Dogs are not allowed on trails. Dogs are allowed on a leash under your control only on Channel Drive (a paved road) within the park. Lake Ilsanjo offers excellent fishing for black bass and bluegill. Black bass weighing nine pounds and more have been caught here. A purple plastic worm is a favored bait for the bass, while the bluegill favor garden worms, small crayfish, and grubs. If you are 16 years of age or older, you must have a California fishing license. Ledson Marsh dries up by late August or early September and so no fish are found there.

Fun and beautiful trail with a lake at the end. Stunning views some uneven ground but overall a great trail. A bit muddy after lots of rain.

28 days ago

My favorite place to go for a quick hike in Santa Rosa. Keep an eye out for stone couch at the top, you definitely don't want to miss that!

Amazing park with long gradual rolling hills. Very impressed to feel deep within the forrest while being so close to town.

mountain biking
2 months ago

Favorite place to mountain bike.

Beautiful trail. The end of it was on a fire road where I usually prefer dirt trails but a wonderful mild hike regardless.

Love this loop! Difficult enough, but manageable.

3 months ago

Beautiful spot with a lake that jumps out and surprises you!

Beautiful trail lots of rocks and mountain bikes on the trails.

it was nice and shady :)

trail running
5 months ago

Beautiful trail! Challenging, with amazing views.

on Rough Go Loop Trail

trail running
5 months ago

The beginning is very steep, but so worth it!!! Great run!

This is a fine trail to get into the heart of Annadel State Park, at parts rigorous.

Love Annadel trail system

6 months ago

We went from Lawndale to marsh, pig flat and around the ridge. It was a long 14 miles

Rocky but connects to the backside of Annadel and the Marsh

Nice thing about Annadel is you can connect onto the other trails for a nice loop