The Best Mountain Bike Trails in Ontario, California
www.bumsteadsbikes.com (909) 984-9067
The first place is in La Verne called Marshall Canyon. It started as an equestrian trail, but now allows cyclists and runners too. It's a great place to ride from beginner trails to expert singletrack stuff.
The second best is Bonelli Park in Pomona. They've also got fire road and singletrack all interconnected. You can get some maps from Bonelli's website. http://www.bonellipark.org/
From beginner to expert, get out to the local trails and have a blast!
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