Heat Traeger grill to high. Once the temperature reads at least 400 degrees, add orange slices and jalapeño halves to the grill.
Grill for approximately 5 minutes, flipping both pepper halves and orange slices halfway through until they have charred grill marks and are softened.
In a large pitcher, muddle together peppers, orange slices, honey and lemon juice (be sure to reserve 4 grilled orange slices for garnish). Add water and stir to combine.
Cool lemonade completely in the refrigerator.
When ready to serve, strain lemonade into another pitcher through a fine mesh sieve.
Fill 4 tall glasses with ice.
Fill each glass halfway full with the grilled jalapeño orange lemonade.
Top with pale ale until the glasses are full. Lightly stir to combine.
Garnish each glass with jalapeño and a grilled orange slice. Serve immediately.