Today is Opening Day for Trails, which means it's time to start working out outside

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Let the outdoor workouts begin: Today is the launch of hiking season! Or, more accurately, it's Opening Day for Trails, an event led by the Rails-to-Trails Conservancy that marks the unofficial kick-off for a spring and summer full of hiking and biking your local trail systems. (Or even just Toning Every Inch On a Park Bench.)

"Trails are an integral part of communities across the nation, and Opening Day for Trails allows both fair weather trail users and year-round enthusiasts to show their love for their favorite pathway or trail system," says Katie Harris, communications coordinator of Rails-to-Trails Conservancy.

Rails-to-Trails is a nonprofit that has already created over 30,000 miles of trails from former railroad lines, and today they're hosting events in 11 states across the country. The idea is to encourage people to not only get out and enjoy the warmer weather but to remind them that these paths are in their own backyard and open for any type of use. "Whether you're training for your first 5K, riding bikes with your grandchildren, or commuting to work, you'll soon discover that trails are an essential part of healthy communities nationwide," Harris adds. (Also, try these 10 New Outdoor Workout Ideas.)

They're hosting more than 30 events today, a full list of which you can find on their site. Check out a few of our favorites.

Adaptive Cycling Event in Berkeley, CA

Bike East Bay and the Bay Area Outreach and Recreation Program are helping fit disabled cyclists and cycling enthusiasts for their own adaptive bike, then hitting the trails for a group ride.

Community Run and Preview of New Ultramarathon Course in Wyanet, IL

This community is putting on a run on the Hennepin Canal Parkway, followed by a family-style picnic in the evening. Participants are also invited to stay the night at the campground.

Ribbon Cutting and Community Ride on the Jones Falls Trail in Baltimore, MD

Baltimoreons can come celebrate the newest member of their trail family at the ribbon cutting and inaugural nine-mile bike ride of the Jones Falls Trail.

Historical Bike Ride in Detroit, MI

Riders can cruise through their city, riding pass current and past sports venues as the tour leader gives an oral history and provides trivia.