Join Sand Creek Regional Greenway at this point.
Once you have traveled over the Sand Creek Bridge, you will see a sign pointing you west toward the trail. This is the Sand Creek Greenway and trail #3 on your journey.
Be aware that, although there are some paved portions of this trail, it is mostly dirt and gravel (for now). If you are biking this path, you should probably be using trail tires on your bike instead of high pressure, road tires.