Azimio leader Raila Odinga has arrived at Sahara Hotel in Kiambu town ahead of the people's baraza.
Wiper leader Kalonzo Musyoka and Narc Kenya leader Martha Karua have also arrived in the county for the rally.
Shortly after arrival at the hotel, Raila and his team hit the streets with the key message being that the William Ruto administration must go for failing to address people's grievances.
The rally is the last of the ODM leader's public baraza ahead of the much awaited 'date with destiny' mass action slated for Monday.
Azimio leaders will, however, traverse Nairobi estates over the weekend to mobilise supporters ahead of Monday's march to State House.
The mobilisation rallies will be led by City Azimio MPs and MCAs as well as grassroots leaders on Saturday and Sunday to prepare the ground for the mega protest expected to be attended by thousands of Azimio supporters.
ODM MPs are on Friday expected to issue a public notice on the estates they will tour for the mobilisation exercise ahead of the mass action.
President William Ruto has warned against chaotic protests and asked Raila to work with the police to ensure lives and property are safeguarded during the defiance march.
"We have no problem with you organising demonstrations but please it is your responsibility to work with the police to make sure that the rest of the citizens of Kenya, their lives are not disrupted, their property is not destroyed, their business is not affected and they can go to work (then) you can carry out your demonstrations," Ruto said on Wednesday at State House.
Raila assured the head of state that nothing will go wrong amid jitters from a section of business people from the Mt Kenya region that their property may be destroyed.
"I want Kikuyu businessmen not to be scared. Let them not be disturbed by the propaganda, we are going to protect everyone's business," Raila said during Azimio rally in Nakuru on Thursday.
His assurance followed unsubstantiated claims by CAS nominee Dennis Itumbi and Kikuyu MP Kimani Ichung'wah that there were plans to invade Kikuyu businesses during Monday's protests.
"The plan is to invade "Kikuyu" business in Riveroad, Tom Mboya and Moi Avenue.." So as to drive police to that side as the second group uses the Sagret route to access State House," Itumbi said.
In response, Raila assured the Nairobi business community that they have nothing to fear as no one will destroy their property.
"We want to improve the economy. We want to create employment for Kenyans, we cannot go and destroy businesses belonging to small people."