A weekend outdoor itinerary in Dublin

A weekend outdoor itinerary in Dublin: 5 curated places with practical notes on cost, distance, parking and what makes each stop worthwhile.

Trinity College Campus - Free (paid Book of Kells/Long Room); Self-guided campus walk
Phoenix Park - Free; 11 km perimeter, open access
Killiney Hill Park - Free; 2-3 km of paths
Howth Cliff Walk - Free; 7.8 km loop
Dollymount Strand - Free; 5 km strand