Rancho Cucamonga offers a well-equipped environment for various outdoor activities such as walking, jogging, biking, and hiking, thanks to its geographical features that blend mountains and city. The city has multiple bike and pedestrian trails that connect various routes, allowing for easy biking around town or using them as jogging paths.

The Deer Creek Channel Trail is a representative multi-use trail that runs north to south through Rancho Cucamonga, featuring wide asphalt paths and shaded areas created by trees, providing a pleasant exercise environment. Many residents enjoy jogging and walking during early morning or evening hours.

For hiking enthusiasts, the mountainous area north of the city is the best exercise location. The Icehouse Canyon Trail is a popular hiking route within the San Gabriel Mountains, including a path that leads to Cucamonga Peak (8,859 feet/2,700 meters).

There are various difficulty levels from beginner to advanced, and depending on the season, hikers can enjoy different natural scenery such as waterfalls, autumn leaves, and snowy landscapes. Most trailheads are accessible from the canyon area towards Claremont, and some parking areas require an America the Beautiful Pass or Adventure Pass. Early spring and fall are the most pleasant hiking seasons, and it's essential to prepare enough water for high-altitude hikes during the summer.

Indoor exercise facilities are also well-established in Rancho Cucamonga. Major gym chains like 24 Hour Fitness, Planet Fitness, and LA Fitness operate several locations within the city.

There are municipal recreation centers and sports complexes where facilities for swimming, badminton, and basketball are available.

Among the Korean community, taekwondo studios are popular exercise spaces, offering various programs from taekwondo training for children to fitness training for adults. There are also yoga studios and Pilates centers near Victoria Gardens, making it easy to find a workout that suits your preferences. The number of pickleball courts in the area is also on the rise, becoming a sport enjoyed widely by both seniors and younger generations.