Remove the needles or leaves from the thyme and rosemary by holding the sprig at the top and sliding your fingers down. You should be able to strip the herb sprigs in one motion.
Place the rosemary, thyme, and sage leaves into a small food processor. Add the garlic and olive oil and pulse on high until it forms a paste.
Using a paper towel, pat the pork dry. Season the entire roast (inside and out) with salt and pepper.
Generously spread the herb paste over the entire roast. Place the roast on a large plate, then tightly cover with foil or plastic wrap and refrigerate overnight.
Remove the roast from the foil or plastic wrap. Wrap small pieces of foil over the top of each bone. This will prevent the bones from burning/charring. Place the pork into a roasting pan and bake at 400 degrees Fahrenheit for 30 minutes, then reduce the heat to 350 degrees Fahrenheit and bake for 1 hour and 15 minutes. If you're unsure if the roast is done, poke the thickest part of the meat with a meat thermometer, it should be at least 140 degrees Fahrenheit.
Note: In the roasting pan, you can see that I baked a few seasoned potatoes along with the crown roast. I was just experimenting to see if they could be roasted at the same time as the pork; which totally worked out to an awesome one pan dinner! That's totally optional though.