0002094265 2026-04-09 2026-04-09 0002094265 MLAAW:UnitsEachConsistingOfOneClassOrdinaryShareAndOnehalfOfOneRedeemableWarrantMember 2026-04-09 2026-04-09 0002094265 MLAAW:ClassOrdinarySharesParValue0.0001PerShareMember 2026-04-09 2026-04-09 0002094265 MLAAW:WarrantsEachWholeWarrantExercisableForOneClassOrdinaryShareAtExercisePriceOf11.50PerShareMember 2026-04-09 2026-04-09 false 0002094265 8-K 2026-04-09 MOUNTAIN LAKE ACQUISITION CORP. II E9 001-43075 98-1891915 930 Tahoe Blvd STE 802 PMB 45 Incline Village NV 89451 775 204-1489 true false false false Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant MLAAU NASDAQ Class A ordinary shares, par value $0.0001 per share MLAA NASDAQ Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share MLAAW NASDAQ true false