El Reno
Famous fried onion burgers since 1926
El Reno is the undisputed onion burger capital of the world. During the Great Depression, cooks stretched ground beef by mixing in thinly sliced onions — and a Route 66 culinary tradition was born. Sid's Diner and Robert's Grill still serve them the original way.
Robert's Grill has been serving onion burgers since 1926 — making it as old as Route 66 itself. The tiny diner has just a handful of counter stools and a flat-top grill that hasn't stopped sizzling for a century. Sid's Diner, equally legendary, draws burger pilgrims from across the country. Fort Reno, a frontier military post established in 1874, adds historical depth to this small town.
exploreWhat to Experience
Things to See & Do in El Reno
Sid's Diner
CAN'T MISSFamous for Depression-era onion burgers — thin beef patties smashed into thinly sliced onions on a flat grill. A Route 66 pilgrimage for burger lovers.
Robert's Grill
CAN'T MISSServing onion burgers since 1926 — as old as Route 66 itself. A tiny counter-service diner with just a handful of stools.
Fort Reno Historic Site
Established in 1874 as a frontier military post. Served through both World Wars and housed German and Italian POWs during WWII.
Canadian County Historical Museum
Preserving the heritage of Canadian County and El Reno with exhibits on Native American history, land runs, Fort Reno, and Route 66.
restaurantWhere to Eat
Sid's Diner
Burger$RT66 CLASSICFamous for Depression-era onion burgers — thin beef patties smashed into thinly sliced onions on a flat grill. A tiny counter-service spot that's a Route 66 pilgrimage.
Robert's Grill
Burger$RT66 CLASSICServing onion burgers since 1926. The oldest onion burger joint in El Reno with just a handful of counter stools and a flat-top grill.
Tips for Visiting El Reno
Eat at both Sid's and Robert's — they're different enough to compare, and both are cash-friendly.
The annual Fried Onion Burger Day in May features the world's largest onion burger.
Fort Reno is 7 miles west of town — worth a 30-minute detour for history buffs.