Linz is a Danube town, so most bikes rolling through it are on the Donauradweg, headed east for Vienna or west for Passau. Turn away from the river and the ground rises quickly: the Pöstlingberg and its basilica stand directly above the city, and behind them the granite hills of the Mühlviertel run north toward the Czech border in a series of short, honest climbs.
Drip Coffee Culture in the city is owned by a rider who raced, and it is the natural place to leave from.