Thunder Bay isn't known for being a walkable city. This is largely due its Twin-Cities heritage which causes the city to be very spread out. Until 1970, the city was actually two separate large communities Fort William and Port Arthur separated by a swamp that has since been built up. City council seems to finally, in recent years, be developing the north end Port Arthur into an entertainment district with the Marina Park as its centrepiece, and the south end Fort William into a business district. Within each of these districts North end and South end downtown cores walking is certainly viable in the non-winter months. During the winter months, your face will freeze off.
As a result of this, your best way to get between these two zones is by bus. Up-to-date schedules are available on Thunder Bay Transit's (http://www.thunderbay.ca/...) official website.
Alternatively, there are multiple taxi services.
The city is increasingly focused on expanding its network of bicycle paths as well. Transport by inline skates can work well on these paths, but sidewalks are often too mottled to afford any speed or efficiency on skates.
