These are the most popular rides at Disneyland and California Adventure park. They can have long waits since so many guests want to ride them. They are good to rope drop and ride right when the parks open or you might want to pay for Lightning Lanes for them to have a much shorter wait.
Star Wars: Rise of the Resistance

Star Wars: Rise Of The Resistance is an immersive Star Wars themed ride in Galaxy’s Edge. This ride is super popular and is also a popular one for people to hurry to at rope drop when Disneyland opens. You can purchase a Lightning Lane Single Pass to wait in a much quicker line for the ride.
Big Thunder Mountain Railroad

Big Thunder Mountain Railroad is a train style roller coaster in Frontierland in Disneyland. It’s really fun and thrilling. It’s a very popular roller coaster attraction.
Space Mountain

Space Mountain is a dark roller coaster in Tomorrowland in Disneyland. The line for this attraction gets long pretty quickly. You can use Lightning Lane Multi Pass to go on this attraction. Another good option is to use the single rider line to wait less. See a list of all the Disneyland rides with single rider lines here.
Guardians of the Galaxy – Mission: BREAKOUT!

Guardians of the Galaxy – Mission: BREAKOUT is a drop attraction in Avengers Campus in California Adventure park. This is popular ride to rope drop in that park and it has long lines throughout the day. You can use Lightning Lane Multi Pass for this ride.
Radiator Springs Racers

Radiator Springs Racers is another very popular ride in California Adventure. It’s located in Cars Land and is one of three rides in that land. It has long waits all day, but you can do single rider lines or get a Lightning Lane Single Pass.
Haunted Mansion

Haunted Mansion one of the most loved Disneyland rides amongst Disney goers. It’s a dark ride through a Haunted mansion with fun music, ghosts, and more. This ride is available for Lightning Lane Multi Pass.
Pirates of the Caribbean

Pirates of the Caribbean is another beloved Disneyland ride that is so iconic. It is a Lightning Lane Multi Pass attraction. The wait times for this ride are not too bad in the morning for the standby queue though.
Incredicoaster

Incredicoaster is an Incredibles themed roller coaster in Disney California Adventure park. You might want to consider rope dropping it, buying Lightning Lane Multi Pass, or waiting in the single rider line. This ride used to be California Screamin’. See a list here of Disneyland rides that have changed a lot since they opened.
Indiana Jones Adventure

Indiana Jones Adventure is a very popular attraction in Adventureland in Disneyland. It is really fun and thrilling. You can use Lightning Lane Multi Pass for this ride.
Peter Pan’s Flight

Peter Pan’s Flight is probably the most popular ride in Fantasyland in Disneyland. It has long waits all day due to there not being very many ride vehicles and each ride vehicle only holds 2-3 people at a time. It’s a very cute ride than many Disney fans love and must ride each trip.