For the vinaigrette: In a small bowl, whisk together the apple cider vinegar, maple syrup, minced garlic, Dijon mustard, grainy country-style mustard, kosher salt, and black pepper until well combined.
While continuously whisking for 2-3 minutes, slowly drizzle in the olive oil until the vinaigrette is emulsified and creamy. Set aside.
In a large bowl, combine the arugula, thinly sliced or diced Bartlett pear, and crumbled goat cheese.
Drizzle the prepared maple vinaigrette over the salad ingredients.
Toss gently to ensure all ingredients are evenly coated with the dressing.
Taste and adjust seasoning if necessary. Serve immediately.