Welcome to Mission Peak, the popular public park and regional preserve located just east of Fremont, part of the Diablo Range. Mission Peak is the northern summit close to Mt. Allison and Monument Peak. Its total elevation reaches 2,516', the very top holding an iconic pole that is also actually used as the city of Fremont's logo.
Hiking is a huge deal here, the main trail to the summit being 3+ miles and taking around 5 hours for the round trip. It is certainly a hike meant for more seasoned hikers, as it is fairly difficult. There are other trails as well, of course, such as the popular Peak Trail, part of the much larger (550+ miles) Bay Area Ridge Trail.
You can also bike, horseback ride, or wildlife watch while here, with plenty of goats, hawks, and vultures nearby the 3,000-acre public parkland and summit. If your group would like, you can also set up an interpretive hike or other naturalist-led activity from the Coyote Hills Visitor Center. Locals also enjoy R/C flying and hang gliding or paragliding through the wings of Rogallo Club onsite.