No, there is no need to boil beets before roasting. Do not add the extra work. Simply, remove the greens, stems, and tiny roots, wash thoroughly and pat dry with paper towels, place the beets on top of tin foil, drizzle with olive oil or grapeseed oil, season with kosher salt, enclose the beets with the foil creating a foil packet, and roast at 415 degrees until tender.