Hi there, Susan, glad to see you here at planDisney.
I love that you're considering being part of a runner's ChEAR squad! It is an awesome thing to have supporters out there encouraging you throughout the race. I know before the races ceased a few years back there were special packages for spectators. I'm so glad Disneyland Resort races started again, however, at this time, there is nothing specific for spectators to register for at the 
Disneyland Resort, outside of being able to check out the 
runDisney race expo. I recommend checking out the 
race guide specific to each event as the race gets closer.
Spectators can cheer on runners throughout the race, many gather between the parks in the esplanade or at the start and finish lines. When my family came to cheer me on recently, it was great to see their smiling faces halfway through the race! You can make signs for your racer, too! Makes it easy for them to spot you in the crowd. Bundle up, though, because the crisp early morning weather can be a doozy! Encourage your racers to listen to the 
planDisney podcast on 
runDisney! My pal, 
Melissa H. did a great job as a guest speaker sharing tips and recommendations for a race.
I hope this helps you make your plans for January, Susan. I know it may seem miles away, but it will be here before you know it! If you have any questions about
 runDisney or planning your visit, because a race should always end with some time to play in the park (or a nice pedicure or massage from 
Tenaya Stone Spa at 
Disney's Grand Californian Hotel & Spa), feel free to 
reach out again!
Wishing you a magical week!
Camille