The Coalition for Reforms and Democracy (Cord) has told supporters to come out in large numbers to vote and deliver a first round win.
Cord presidential candidate Raila Odinga and his running mate, Kalonzo Musyoka led the alliance in campaigns in the Rift Valley and western Kenya.
The leaders addressed rallies at Kenyatta Stadium in Kitale, Bungoma town, Malava border and Busia stadium.
Speaking in Kitale, Mr Odinga urged all registered voters to turn up and vote on Monday, saying their vote is crucial in determining Kenya's destiny.
He told supporters to rally behind Cord and cast their ballot to enable it win in the first round.
"Come next Monday, I call upon each one of you to turn up in large numbers, vote as a block in favour of Cord and I know we shall win in the first round and as from March 5 we are going to start marching towards true change and transformation of this country,” Mr Odinga said Thursday.
Mr Odinga dismissed Cord opponents as having nothing new to offer Kenyans.
"Be wary of conmen who are peddling propaganda and empty rhetoric that would not benefit any Kenyan. They have nothing new to offer you, therefore, must reject them,” he said.
Mr Msuyoka appealed to Trans Nzoia residents to turn up and vote for Cord to claim victory on March 4.
He pledged that the Sh6 billion earmarked for the presidential re-run would instead be channelled to other areas such as grants for the youth and women as well as in poverty alleviation.
"The secret of winning in the first round is for you voters to turn out in large numbers and vote, we will implement the new Constitution to the letter and liberate this country,” he said.
Mr Musyoka asked Cord opponents to concede defeat when they lose and to join in building the nation.
Ford Kenya leader Moses Wetangula asked Cord supporters to mobilise the electorate to vote for the coalition, expressing confidence that the alliance will win and form the next government.