The Fort Collins Trolley will kick off its 2013 season this weekend and offer free rides to mothers and grandmothers on Sunday in honor of Mother’s Day. Fort Collins Municipal Railway had planned to open last week, but the snowstorm prevented that. Birney Car 21 will operate weekends and holidays through September. The trolley's station is near the tennis courts in City Park. It runs from the park to Old Town. See more in the Coloradoan.