Here's a margarita made with gorgeous Rainier cherries. I always add a little beer to my blended margaritas - it gives them a great buoyancy. Just a little though, otherwise your blender will barf all over you.
PNW Cherry Margarita
Approximately 3/4 cup Rainier cherries
1.5 oz tequila (I like Hornitos Anejo for this recipe)
1.5 oz Rainier cherry simple syrup
.75 oz fresh lime juice
.75 oz Cointreau
Couple splashes of beer, I tend to use Tecate
Make the simple syrup ahead of time. Recipe is approximate; you'll want to adjust for preferred sweetness. Blend, drink, repeat.