how long to cook a leg of lamb in the oven
Quick Scoop
A leg of lamb usually takes about 1 hour 10 minutes to 2 hours in the oven for a roast, depending on size, oven temperature, and how done you want it. For a medium result at 325 F / 165 C , a good rule of thumb is about 25 minutes per pound ; for medium-rare , many guides suggest checking around 135 F / 57 C internally, and for medium , around 145 F / 63 C.
Typical Oven Times
- Medium-rare: about 1.5 to 2 hours for many average leg roasts, then rest before carving.
- Medium: about 25 minutes per pound at 325 F / 165 C , or roughly 1 1/2 to 2 hours for a typical leg.
- Well-done / very tender, pull-apart style: much longer, often 4 to 7 hours at lower heat.
Best Rule
The safest way to judge doneness is with a thermometer, not just the clock. Several recipes stress that roasting time varies with the leg’s weight, shape, and how your oven runs, so start checking early.
Simple Guide
- Preheat the oven to 325 F / 165 C for a classic roast.
- Roast until the center reaches your target temperature.
- Rest the meat for about 15 to 30 minutes before slicing so the juices settle.
Temperatures To Use
| Doneness | Internal temperature | Typical feel |
|---|---|---|
| Medium-rare | About 135 F / 57 C | Pink and juicy |
| Medium | About 145 F / 63 C | Light pink, firmer |
| Pull-apart | About 175 F / 79 C | Very tender, shreddable |
