I had a lot of fun doing it alone but I'd also imagine that it's an activity that's great for couples and families too (actually it's probably more fun for couples and families than loners like me). Basically, you park at one of the railroad's 8 stations, and bike the towpath trail to another one of the stations. Then, you can pay $3 per person to put your bike on a train and ride the train back to your original station. Or, if you feel so inclined, you can do it backwards and pay $3 to take the train to another station, and then bike back up to your car.
Taking a ride through the Cuyahoga Valley exposes one to beautiful scenery and peaceful views. Because of this, the railroad is a popular attraction, and tickets usually run $20 for adults and $14 for children, so the $3 one-way fare is a bargain.
I attached my bike to my car bike rack and drove down to the Rockside Road station, which is located on Rockside Road just West of Valley View. From that station, people can choose to go Northbound on the towpath, which will take them through a paved section that belongs to the Cleveland Metroparks, or they can go Southbound on the mostly gravel and dirt towpath through the national park.
I headed southbound from the Rockside station and biked for a total of about fourteen miles. I passed rivers, bridges, railroad trestles, and so much beautiful foliage. I rode through Brecksville and past Boston Mills ski resort, and into Peninsula. On the way, I passed several train stations which each listed times for arrivals and departures for that station.
Once I got to the Peninsula station, I followed the signs to where people are supposed to board for Bike Aboard. I wasn't sure exactly what to do, so I just followed everyone else. Bikers hand their bikes to the guys on the bike car and tell them to which station they are heading. Then, they return to the Bike Aboard car, pay the $3 per person fare in cash, and enjoy the ride back.
I would very highly suggest this activity for any able-bodied person looking for something to do. If you don't own a bike, you can rent one from one of four places along the towpath, including at Century Cycles in Peninsula. And bonus - right next to the Peninsula station is a Winking Lizard, so you can grab a beer and catch some of the game while you're waiting for the train (I don't suggest wings if you're riding your bike though!)
Complete details for Bike Aboard! are found on the CVSR website here. It runs from Wednesdays through Sundays through October 31, so the season is almost over! I know they had this program last year, so I really hope they continue it in 2015. The $3 is only for bikers, but if you look at their webpage they do have some special fares for hikers as well.
(Don't download the app! The android one at least doesn't do anything but take you to the regular site).