There are mild elevation changes. There have been complaints about the exhaust fumes and dust from the adjacent freeways. These complaints are largely exaggerated. There is a steady up river breeze that dissapates exhaust fumes and dust is seldom any problem at all. The steady up river wind surprisingly results in uphill runs well faster than downhill runs.
Lighting is excellent at night.
It is swept regularly. Bike, blader, runner and walker traffic is steady but never congested. You can park for free at Brackett Field. Follow Fairplex Drive toward the airport, and coninue until the road is closed off by gates. Park there, and ride your bike along the closed road next to the airport, into the park.