Day trip/Cycling Base suggestions

You can literally pick any place in the country, use Strava or Komoot and plan a couple of routes.

I did similar a couple years ago and went to Dingle and did Slea Head drive one day, a loop that included Connor Pass another.

The views in Kerry are pretty decent but it's not widely known because the locals are so bashful.

First step- what part of the country do you want to go to? Cork/Kerry, Galway/Mayo/Clare etc. and take it from there.

Once you have that decided I'm sure people here would happily recommend routes. Some I've done recently-

From Carrick on Shannon- https://www.strava.com/activities/6121651305

Limerick 3 counties- https://www.strava.com/activities/5948108509

Galway to the Burren- https://www.strava.com/activities/5866288921

The Hospice Cycle this year was based in Killarney and we had two magnificent days of cycling a few weeks ago. I can share the routes with you if you plan heading that direction. Admittedly we were very lucky with the weather. I took the bike down and back on the train which was a no-brainer thanks to having the free travel card!

There are some nice long-distance routes out of Dublin that avoid busy roads but the scenery and climbs in Kerry and West Cork are remarkable.