Official maps (map rotation determined by end-of-map votes):

arena_badlands
arena_granary
arena_lumberyard
arena_nucleus
arena_offblast_final
arena_ravine
arena_sawmill
arena_watchtower
arena_well
cp_badlands
cp_coldfront
cp_dustbowl
cp_egypt_final
cp_fastlane
cp_freight_final1
cp_gorge
cp_granary
cp_gravelpit
cp_gullywash_final1
cp_junction_final
cp_manor_event
cp_mountainlab
cp_steel
cp_well
cp_yukon_final
ctf_2fort
ctf_doublecross
ctf_sawmill
ctf_turbine
ctf_well
koth_harvest_final
koth_harvest_event
koth_lakeside_final
koth_nucleus
koth_sawmill
koth_viaduct
koth_viaduct_event
pl_badwater
pl_barnblitz
pl_goldrush
pl_frontier_final
pl_hoodoo_final
pl_thundermountain
pl_upward
plr_hightower
plr_nightfall_final
plr_pipeline
sd_doomsday
tc_hydro

Custom maps:

avanti_b1
cp_warpath2
cp_waste
pl_cashworks_rc2
rock2_b1