Brush trout with 2 tablespoons lemon juice, and sprinkle with cracked pepper.
Melt 2 tablespoons butter in a large nonstick skillet over medium-high heat; add 2 trout, and cook 6 to 8 minutes, turning once, or until fish flakes easily when tested with a fork. Remove to a serving platter, and keep warm. Repeat procedure with remaining butter and trout. Wipe drippings from skillet with a paper towel.
Melt remaining 1/4 cup butter in skillet; add almonds, and sauté until golden. Stir in 1/4 cup lemon juice and parsley; pour over trout. Garnish, if desired.