Lewis, a Republican, and Garcia Holmes, an independent, have separate announcements scheduled Sunday afternoon.
They will join former Bernalillo County Commissioner Deanna Archuleta — a Democrat who announced her campaign in May last year — and Stella Padilla, a retired Old Town resident and Democrat, in the race.
The nonpartisan election is Oct. 3. If no candidate wins a majority of votes in the first round, a runoff election will be scheduled for November.
Incumbent Mayor Richard Berry, a Republican in his second term, has said he won’t run for re-election.
It’ll be the first Albuquerque mayoral election in 20 years without an incumbent on the ballot, and the race is attracting a variety of candidates.