Event manager Kevin Murphy said he expected Napier Hill to provide an "up close and personal" vantage point of the weekend road races.
"The key for the road race is the multi-laps we do over Napier Hill and there's a fantastic spectator spot on top of that hill, where there will be lots of spectators. There's a screen to watch live coverage, there's commentary and a whole lot of activities and fun there.
"It will give spectators a chance to get up close and personal to all the action and also have a lot of fun.
"They will also see the riders really working hard to get over that hill - eight times for the men and five times for the women."
Mr Murphy said the riders would need all the support they could by the final climb.
"It's a fantastic feature of the race and a chance for the spectators to get fully integrated with the riders, they will very much enjoy what support they get on what is a very tough part of the course."
Spencer Rd, the Botanical Gardens – and Marine Parade – outside the Napier Conference Centre, would also be prime viewing spots.
"Town course action takes place from about 10.30am to 1.30pm both tomorrow and Sunday."
A list of road closures throughout the carnival can be found at summercyclingcarnival.co.nz