Heat oven to 350° F. In a large bowl, toss the peaches, granulated sugar, and 1 tablespoon of the flour. Transfer to a shallow 3-quart baking dish.
In a separate bowl, combine the brown sugar, salt, and the remaining ¾ cup of flour. Using your fingers, incorporate the butter until coarse crumbs form. Mix in the oats and almonds.
Squeeze the topping into marble-size clumps and sprinkle on the peaches. Bake until the top is golden and the fruit is tender, 45 to 55 minutes.