You're in the west now right? You can hit the bay trail all the way out to treasure island from right behind Ikea. Loop treasure island and then cut through the emeryville shopping center to get to the marina by chilli's. Ride that all the way out to the craneway in richmond, and if you're still feeling froggish after that, take harbour way south to cutting and loop point richmond. The whole route is paved and should give you a round trip of about sixty miles, it's mostly flat with short, moderate, inclines at treasure island and point richmond. Probably take you about five hours or so.
I prefer steel frames too. Outside of my frame, everything is carbon fiber though. Fork, seat, seatpost, brake levers. It's a great mix. Firm, but compliant, with a lot of soul, which I find aluminum frames to lack.
If you're interested in a new bike, check out
bikesdirect.com
Never found the need for more than one gear out here