Martha Ohlson, Sierra Club outings leader and extreme backpacker, will share her recent treks across Isle Royale National Park in Michigan. Free. Fort Worth Botanic Garden 3220 Botanic Garden Blvd. Azalea Rm Ft Worth , TX Event URL Event Tags Bird & Nature Walks Conservation Environment Wildlife Date and Time Feb 20 2014 | 1:00am - Feb 20 2014 | 2:30am