Today, runDisney released a statement regarding the cancelations of all 2018 Disneyland Resort race weekends. The reason is ongoing construction at the resort and wanting to provide magical runDisney experiences for all guests participating.
All Coast-to-Coast challenges are included in this hiatus as well. All guests that have already registered will receive full refunds for any race fees and merchandise that was pre-paid.
The upcoming Avengers race weekend in November will be the last at the Disneyland Resort for the foreseeable future.