Not anymore.
Narok Maasai had beef with Kalenjin over Mau forest and the support of Ole Tunai.
Then majority of Maasai - Purko Clan (who are like 30 % of Narok) - had beef that Kipsigis were backing a minority ole Tunai (from tiny Siria clan) and protecting him.
Now Ruto solved those two issues.
1) Mau forest is settled - kipsigis were removed and Ruto promised them land after he wins
2) Purko - Ole Ntutu - is now being supported by Kipsigis.
Now the rest of Maasai clans - are generally friendly if not half-kalenjin.
Uasin-Gishu, Motianik (Sunkulis is half-kalenjin) name it.
In short I expect Ruto to win Narok by 65-70 percent.
Being Kalenjin+Kikuyu at 40 percent; and Maasai will split almost half - giving Ruto another 25 percent.
Narok is 50:50 interms of presidential vote,on other elective seats,specifically Senate,gavana,yes UDA has upoerhand coz of the Kalenjin factor in Narok,but maasais wing of Narok iko ODM.Check mizani polls on presidential candidate popularity