In a large bowl, combine flour and salt; cut in shortening until crumbly. Gradually add water, tossing with a fork until dough forms a ball. Divide dough in half. Roll out one portion. Line a 9-in. pie plate with bottom crust; trim pastry even with edge.
Drain cherries, reserving 1/4 cup juice. In a large bowl, combine the sugar, tapioca, extract, salt, food coloring if desired and reserved juice. Gently stir in the cherries; let stand for 15 minutes.
Pour into the crust. Dot with butter. Roll out remaining pastry; make a lattice crust. Seal and flute edges. Bake at 375° for 55-60 minutes. Cool on a wire rack.