Preheat oven to 400°F.
Add the carrots, olive oil, chili powder, cumin, paprika and salt to a large bowl. Toss gently until the carrots are evenly coated in the spices. Spread out into a single layer on a baking sheet.
Roast the carrots for 15-20 minutes, tossing halfway, or until fork-tender and lightly browned and caramelized.
Garnish with fresh, minced cilantro, if desired.
