Preheat the oven to 350 degrees F (175 degrees C). Grease a 12-cup muffin pan or line with paper liners. Place raisins into a cup and add enough hot water to cover. Let stand for a few minutes to plump.

In a large bowl, stir together whole wheat flour, brown sugar, pumpkin pie spice, baking powder, baking soda, and salt. Make a well in the center; put eggs, pumpkin, oil, and honey into the well. Mix just until dry ingredients are absorbed.

Drain excess water from raisins. Stir raisins and walnuts into batter, then spoon batter into the prepared muffin cups, filling each 2/3 full.