When in the heritage town of Kells, take the R163 road for Oldcastle about 2km out from the town centre.
A sign (easily missed) for the People's Park points the way to the right up the cul-de-sac to the car park.
As mentioned in another comment, in addition to ticking off a summit, one can take a wander about the famine burial area, tthe Spire itself (occasionally open if there on the right day) and also if in the humour for a walk, take the tracks to the North side of the playground which circuit some of the large fields and take you down to the R147, crossing this follow the (somewhat poorly) marked Riverside walk along the Blackwater, passing the old Victorian waterworks, by the edge of the Business Park and returning across the R147 again and back up to the return track up to the Spire again. About 45mins of a walk. There are (weather permitting) great views from this hilltop. Linkback: https://mountainviews.ie/summit/1520/comment/23310/