There are going to be a lot of streets closed in downtown Grand Rapids tomorrow.  Nope, it's not a's not a political's not a holiday.

It's a bicycle race, and a lot of them.

More than 5,000 bicyclists and sideline supporters are expected to hit the streets of downtown Grand Rapids Saturday for the fourth annual Herman Miller Grand Cycling Classic bicycle competition.

Grand Rapids is hosting the 2012 USA Cycling Professional Men's Criterium National Championship. You'll see America's top pro riders compete for the gold in an 80 km race along a 1.2 km course in downtown Grand Rapids. Historic brick-paved streets, tight turns and speeds of up to 40 mph in a 90-minute adrenaline rush for cyclists and spectators.

Start the day off with the second annual Grand Cycling Challenge ride.  The 2.5-hour ride is open to cyclists of all abilities and takes riders on a 6.25 km course through downtown.

Prior to the Pro Criterium National Championship, kids 9 and under can hit the bricks for the Helen DeVos Children's Hospital Kids Race. Free helmets to the first 100 kids to register, thanks to the Grand Rapids Griffins' Put a lid on it program.

The Herman Miller Grand Cycling Classic will also host a series of professional and amateur races, including the Senior Women's Pro/Am NCC race. This 75-minute timed race features elite Category 1 and 2 riders. Men's Amateur and Masters Categories races will round out the day.
What fun in downtown GR this weekend.  For complete information Check out the full event schedule here.