If it is a rigid cast, that is a little different and harder to get into things than full leg brace (braces have at least some flexibility.
Someone who is not able to bend the leg at all might have very few attractions they can ride and may have to settle for show. The wheelchair space In most of the wheelchair accessible ride cars is around 48 inches long.
So, if someone is using a wheelchair and has their leg extended out in front of them, they are likely to be longer than 48 inches.
My DD's personal wheelchair from the tips of her toes to the back of the push handles is almost 40 inches ( and she has little feet). Add a packed backpack, and her wheelchair is about 46 inches. Someone with longer feet or an extended leg might be longer than 48 inches in a wheelchair.
The attractions listed below
might have room for someone out of a wheelchair in a regular seat.
Wheelchairs can be brought all the way to the boarding area of most attractions.
Peter Pan and Tomorrowland Transit Authority have moving walkways which can't be slowed or stopped, so would not be accessible to someone with a long leg cast.
Disney used to have a FAQs on their website where they did list the attractions that had more room for a leg cast.
Besides size, you would need to check with the doctor for some - like Tower of Terror. Don't want to risk damage by jostling the leg too much. I removed the things that no longer exist, added the replacement in its place, if the ride car is the same/similar and added some notes about ride cars.
The following attractions have additional space on aisle ways or next to the seating areas and should be able to accommodate a full leg cast. Please speak with a Cast Member at each of these locations for additional information.
Magic Kingdom
- Walt Disney World Railroad (has a wheelchair space in the front car and should fit)
- The Jungle Cruise (has a wheelchair boat and should fit)
- Liberty Belle Riverboat (permanent ramp to get in and open space for parking)
- "it's a small world" (has a wheelchair boat and should fit)
- Cinderella's Golden Carrousel
- Stitch's Great Escape (has wheelchair spots and should fit)
- Monster's Inc. Laugh Floor
- Walt Disney's Carousel of Progress
- Tiki Room
- Country Bear Jamboree
- The Diamond Horseshoe Revue
- The Hall of Presidents
- Laugh Floor
- Mickey's Philharmagic
- Winnie the Pooh has a wheelchair car and a wheelchair should fit with a full leg cast.
Epcot
- Ellen's Energy Adventure (Universe of Energy - kind of tight and may not fit)
- 3 Cabelleros (Mexico - wheelchair boat should not be a problem.
- Wonders of China
- The American Adventure
- America Gardens Theater
- Impressions de France
- O Canada!
- Captain EO
- Turtle Talk (The Living Seas with Nemo and Friends - does have a wheelchair car, but it's kind of tight and someone with an extended leg may not fit)
- Attractions at Living Seas
- Living with the Land (The Land)
- Circle of Life movie (The Land)
Disney-MGM Studios
- Star Tours (check with doctor)
- Twilight Zone Tower of Terror (check with doctor)
- Muppet*Vision 4D
- Indiana Jones Epic Stunt Spectacular
- Lights, Motors, Action
- Sounds Dangerous (probably closing for good)
- American Idol Experience
- Backlot Tour (has wheelchair car and may fit)
- Great Movie Ride (has wheelchair car and may fit. There is a tight turn to get into the wheelchair accessible ride car. There is one ride car the holds more than one wheelchair - someone with a long cast might fit better in that ride car)
- Voyage of the Little Mermaid
- Playhouse Disney, Live on Stage
- The Magic of Disney Animation
- Walt Disney, One Man's Dream
Animal Kingdom
- Kilimanjaro Safaris - wheelchair accessible ride car which is very similar to the Backstage Tour tram. Someone whose wheelchair fits in one should fit in the other)
- Pangani Forest Exploration Trail
- Wildlife Express to Conservation Station
- Conservation Station
- It's Tough to be a Bug
- Safari Village Trails
- Festival of the Lion King
- Maharajah Jungle Trek
- Flights of Wonder
- Nemo, the Musical
For MKSomeone with a long leg cast may not be able to get into Splash Mountain or possibly Pirates because the ride cars are pretty tight. Pirates, possibly is not an easy step in, but might be doable with a long leg cast or brace.
Splash has a high step over the side, so would probably not work.
Haunted Mansion would probably not work - possibly would work in his own ride car.
Buzz Lightyear and Aladdin have wheelchair cars, but both a tight and the regular car does not have much leg room, although someone with a long leg cast might fit in a row by himself, sitting partly sideways.
The Great Goofini just opened and does not look like it would have space.
For Epcot, Mission Space ride car is fairly tight, so he may not fit and would not have the option of a ride car for himself, but maybe it would work if there were less than 4 in the ride car and if OK with his doctor (even green version can move you around).
Spaceship Earth is also fairly tight, although the walk in is flat.
Maelstrom in Norway is about the same to get into as Splash Mountain - tight and high step over the side.
For the Studio, Toy Story Midway Mania has a wheelchair car, but someone may not fit with a long leg cast. My DD's wheelchair is a fairly tight fit.
They may or may not fit if transferring to the regular ride car, but would have to use the accessible boarding area anyway to avoid the stairs in the regular line.
For AK, if he gets the OK from his doctor and has a waterproof cast, a person with a long leg cast may be able to ride Kali River Rpids. It won't be easy in or out, but they have a special boarding area for guests with disabilities where they trap a boat so it stays still. I would not recommend it though - the water in the boat makes things slippery and the chance of getting totally soaked is great.
Expedition Everest is another one to ask the doctor about. The ride car is pretty tight, but there is a practice car guests can try to see if they would fit.
Dinosaur is very rough and fairly tight.
I would highly recommend skipping Primeval Whirl. It is rough and jostles riders around a lot. Without binging able to use the leg, the rider would not be able to brace very well and would be jostled more than usual.