Lasu Tumi

{{short description|Mountain in Peru}}

{{Infobox mountain

| name = Lasu Tumi

| photo =

| photo_caption =

| elevation_m = 5200

| elevation_ref = escale.minedu.gob.pe - UGEL map of the Concepción Province (Junín Region)

| prominence_m =

| prominence_ref=

| range = Andes

| listing =

| location = Peru, Junín Region

| map = Peru

| range_coordinates =

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| map_caption = Peru

| map_size = 200

| label_position = right

| coordinates = {{coord|11|56|40|S|74|49|39|W|type:mountain_region:PE_scale:100000|format=dms|display=inline,title}}

| coordinates_ref =

| topo =

| type =

| age =

| first_ascent =

| easiest_route =

}}

Lasu Tumi (local Quechua lasu (rasu) snow, ice, mountain with snow, tumi (historical) knife,{{cite web|url=http://traductor.babylon.com/quechua/a-ingles/rasu/|title=Traductor de Quechua > Traduzca Rasu para Inglés|author=|date=|website=|publisher=babylon.com|accessdate=October 12, 2015|archive-url=https://web.archive.org/web/20150203171952/http://traductor.babylon.com/quechua/a-ingles/rasu/|archive-date=February 3, 2015|url-status=dead}}{{Ref Laime}}{{Ref Simi}} "mountain knife", also spelled Lazo Tumi) is a mountain in Peru, about {{convert|5200|m|ft|abbr=on}} high. It is located in the Junín Region, Huancayo Province, Pariahuanca District. It lies northeast of a mountain named Ututuyuq (Quechua ututu a small viper, -yuq a suffix, "the one with the ututu", erroneously also spelled Litutoyo).

Ututuyuq (Ututuyoc) is also the name of an intermittent river which originates near the mountain. It is an affluent of the Lampa River.