Flag Hill Loop Trail

HARD 29 reviews
#4 of 11 trails in

Flag Hill Loop Trail is a 3.7 mile moderately trafficked loop trail located near Sunol, California that features beautiful wild flowers and is rated as difficult. The trail offers a number of activity options and is accessible year-round. Dogs are also able to use this trail.

DISTANCE
3.7 miles
ELEVATION GAIN
1020 feet
ROUTE TYPE
Loop

dog friendly

birding

hiking

nature trips

trail running

walking

forest

views

wild flowers

wildlife

scramble

A short, steep hike up Flag Hill promises grand scenery and offers a great way to introduce your kids to hiking. Sunol Regional Wilderness is one of the best hiking locales in the East Bay hills northeast of Silicon Valley. This Flag Hill Loop is one of the best ways to see Sunol. This loop is relatively short at 3.7 miles, but it's no cakewalk: Flag Hill summit is 1.3 miles and 900 feet above the Sunol headquarters. It's a tough climb, but it's over soon enough to suit youngsters' short attention spans. The view from the top is one of the best in the Bay Area, well worth the climb. In springtime, the hills are popping with California poppies and many more wildflowers. Once you've soaked up the view from Flag Hill, it's all downhill back to the park headquarters.

hiking
9 days ago

hiking
12 days ago

I love this hike and have been on it a few times. I would consider it to be moderate (difficult trails, to me, involve climbing over rocks or trails with sheer drops) It’s best to go in the spring or fall when the weather is not got, as the trail does not provide any shade. There are some pretty amazing vistas, especially in the early mornings worth the clouds/fog.

There’s a ton of nature to see, including turkeys, ground squirrels, turtles, deer, quail, hawks, and especially cows, which you can walk right alongside. Keep in mind that as great as it is to be so close to the cows, that also means lots of “mud pies” everywhere you step along the trails.

I recommend starting up the Flagstaff trail early in the morning and then stopping by the pond for a break, and heading down via the Indian Joe Creek trail. The hike takes about 2.5-3 hours

Other things to note: There’s a $5 cash only entrance fee. Also the restrooms are not great, so I recommend stopping elsewhere beforehand (eg Sunol super stop)

hiking
1 month ago

hiking
2 months ago

hiking
3 months ago

hiking
3 months ago

hiking
3 months ago

Beautiful trail. Bring your hiking sticks. Go early like 6am. There are two ways to start this loop. I started from Flag Hill Trail and returned via Hayfield road.

hiking
3 months ago

I recommend start hiking in the morning. Not much of shades so it will get super hot.

hiking
4 months ago

4 months ago

horseback riding
4 months ago

hiking
4 months ago

5 months ago

Rocky hike to the summit, but worth for its views. Park hours are 8am to 9 pm, so come early to get the parking spot near the visitor center. So don't have to walk on road to trail starting point.

hiking
6 months ago

hiking
6 months ago

Easy hike, amazing view, dog friendly, and surrounded by beautiful nature.

hiking
7 months ago

Such a beautiful trail! Spring is my favorite time to visit Sunol! This loop is difficult, but the views are worth the sweat! BRING SUNSCREEN AND PLENTY OF WATER! There are cows on this reserve, do not pet the cows! The mommas get very testy! Cows are not aggressive by nature, but will charge is they feel threatened or you get too close to their babies!

hiking
7 months ago

8 months ago

9 months ago

hiking
9 months ago