Start at Ross Castle, on the shore of Lough Leane, where the stone keep and lakeside setting make an atmospheric introduction to Killarney National Park. The castle generally opens around 9:30–10:00 a.m. seasonally; allow about an hour, and check the official schedule before setting out because guided interior tours can vary. Parking is available nearby, though spaces can fill quickly on pleasant September mornings. From central Killarney, it’s roughly a 10-minute drive or a longer, scenic walk through the park.
Continue by car to Muckross House and Gardens, about 15 minutes away. Give yourself around two hours for the Victorian house tour and the landscaped grounds, with time to wander at an unhurried pace. Admission is typically in the €10–€15 range for the house, with the gardens and estate grounds offering plenty to explore; cafés and restrooms are available on-site. This is a good place for a relaxed lunch or coffee rather than trying to fit in another town stop.
Walk or drive the short distance to Muckross Abbey, an evocative medieval ruin surrounded by woodland and old yew trees. Allow about 45 minutes to look around the cloister and church; entry is generally free, although the uneven stone surfaces call for sturdy shoes. Then drive roughly 10 minutes toward Torc Waterfall. The signed forest path from the car park takes about 10–15 minutes each way, with steps and some damp ground; plan on an hour overall. September light is especially good here in mid-afternoon, and the waterfall is often liveliest after rain.
Return to Killarney for dinner at The Laurels Pub on Main Street, a traditional, lively choice with hearty Irish dishes and a welcoming bar atmosphere. Expect approximately €20–€35 per person, and arrive a little before the main dinner rush if you want a table without waiting. If you still have energy afterward, take an easy stroll around the compact town center—most of the evening atmosphere is concentrated along Main Street and the lanes just behind it.
Leave Killarney around 7:30–8:00 a.m. and follow the N72 toward Glenbeigh, allowing extra time for narrow roads, cyclists, and photo stops. Begin at Kerry Bog Village Museum, a small open-air collection of reconstructed thatched cottages showing how families lived and worked in rural Kerry. Allow about an hour; September opening times can vary, so check the museum’s current schedule before setting out. There is straightforward on-site parking, and the visit is best before tour groups arrive.
Continue a few minutes toward Rossbeigh Strand, where a broad sweep of sand opens onto Dingle Bay with mountain views across the water. Park near the beach access and take an easy one-hour walk—no need to attempt the entire strand, especially if the tide or wind is strong. Bring a jacket and shoes that can handle damp sand; this is one of the day’s most atmospheric stops, even in changeable weather.
Drive back toward Killorglin for lunch on your own schedule, then stretch your legs around Killorglin Bridge and the River Laune. The riverside walk takes roughly 45 minutes and gives you a feel for the town beyond its role as a road stop; look for the setting associated with the famous Puck Fair, held each August. From town, drive about 10 minutes to Ballykissane Pier. The small pier is especially good for wide views toward the Iveragh Peninsula and Dingle Bay; allow 45 minutes, and take care on the exposed shoreline in windy conditions. Return to Killorglin before dusk—the approach roads are quiet but poorly lit.
For dinner, settle into Jasper’s Restaurant in Killorglin, allowing about 1½ hours for a relaxed meal built around Irish produce. Expect approximately €25–45 per person before drinks; booking ahead is sensible in September, particularly on Friday and Saturday evenings. Afterward, keep the night local: Killorglin is compact and easy to explore on foot, with pubs and riverside streets close to the restaurant, so there is no need to drive again.
Begin at Cahergall Stone Fort, about 3 km northwest of Cahersiveen, arriving around 9:30 a.m. The beautifully restored dry-stone walls and cloverleaf-shaped interior are best appreciated before tour buses arrive; allow roughly an hour. There is free roadside parking, but the approach is narrow, so pull in carefully and keep clear of passing farm traffic. Continue a few minutes by car to Leacanabuaile Stone Fort, a quieter, more rugged site set among green fields. Spend about 45 minutes exploring the circular enclosure and nearby stone houses, and bring sturdy shoes—the ground can be uneven and damp even in September. Both sites are generally open-access and free.
Drive southwest toward Derrynane—around 35–40 minutes, following the N70 and then local roads—for Daniel O’Connell’s Birthplace. The small historic property provides a more personal introduction to O’Connell than a formal museum, with time to see the house and absorb the peaceful coastal setting; allow about an hour and check the seasonal opening hours before setting out, as they can be limited outside peak summer. Afterward, continue toward Valentia Island and cross the bridge at Portmagee; allow roughly 35 minutes to the Skellig Experience Visitor Centre. Plan 1–1½ hours for its exhibits on Skellig Michael, monastic history, and seabird colonies. The centre’s hours are seasonal, and admission is typically around €10–15; this is also the useful place to check current sea conditions if you are hoping for clear island views from the shore.
Return to Cahersiveen for dinner at The Fertha Bar & Restaurant, a relaxed central choice with seafood, steaks, and traditional Irish dishes in the €20–35 range per person. From the visitor centre, allow about 25 minutes by car, and call ahead if you want a table, particularly on a Saturday night. Have a short wander along Main Street afterward—most of the town is easily covered on foot—before turning in.
Allow roughly 45 minutes from Cahersiveen to Valentia Island, crossing the bridge at Portmagee and continuing toward Cromwell Point. Start around 8:00–8:30 a.m.; the island roads are narrow, and the lighthouse is much more peaceful before midday. Visit Valentia Island Lighthouse at Cromwell Point first, allowing about 1½ hours for the restored lighthouse, keeper’s buildings, and cliff-top Atlantic views. Seasonal opening hours can vary, so check the official listing before setting out; admission is typically around €8–10, with parking nearby.
Continue across the island to Geokaun Mountain and Cliffs, about 15 minutes by car. There is a small entrance fee, usually around €5 per car, and the summit roads are steep and narrow, so take the bends slowly. Give yourself about 1½ hours for the viewpoints: on a clear day you can see the Skelligs, the Blasket Islands, and much of the Kerry coastline. Bring a jacket even in September—the exposed summit is often windy. Then drive around 10 minutes to the Tetrapod Trackway, where a short coastal visit reveals remarkably ancient fossil footprints dating from the Devonian period. Allow 45 minutes and wear shoes with decent grip; the site is exposed, and the shoreline can be slippery.
Head back toward the bridge and continue to Waterville, allowing about 35–45 minutes from the trackway. After a relaxed lunch in the village—The Lobster Bar and Restaurant is a good choice for seafood, while The Coffee Pier works well for something lighter—spend the afternoon at Waterville Beach. Walk the promenade and sandy shore overlooking Ballinskelligs Bay, keeping an eye out for the statue of Charlie Chaplin near the waterfront. Parking is generally straightforward along the village seafront, but September evenings can bring strong Atlantic winds, so pack an extra layer. Finish with dinner at An Corcan Restaurant, where local seafood and Irish dishes generally run about €25–45 per person; reserve ahead if possible, especially for a weekend meal.
Leave Waterville around 8:00 a.m. and follow the N70 toward Killarney National Park, joining the N71 for Ladies View. The drive is roughly 1 hour 15 minutes without stops, but allow closer to two hours with the winding road and viewpoints. Ladies View has a convenient car park and café, and the panorama over the Upper Lake and surrounding mountains is usually clearest in the morning; spend about 30 minutes here, taking care on the busy roadside and watching for coaches.
Continue south on the N71 to Moll’s Gap, another 20–25 minutes away. Pull into the signed viewing area for broad views toward the MacGillycuddy’s Reeks and the rugged valley below. It is exposed, even on a mild day, so bring a waterproof layer. Allow 30 minutes, then drive down toward Kenmare, approximately 25 minutes farther; park in the town center and leave the car for the rest of the day.
Around midday, walk from central Kenmare to Kenmare Stone Circle, one of the largest stone circles in southwest Ireland. It is a short, easy visit—roughly 45 minutes—and there is a small entrance charge, generally a few euros, with opening arrangements sometimes seasonal. Return through the quiet streets into town for lunch or coffee, then spend an unhurried hour along Kenmare Bay. The waterfront walk is especially pleasant around the estuary, with benches and views toward the wooded headlands; check the tide if you are hoping for the most expansive shoreline views.
For dinner, book The Lime Tree Restaurant in advance, particularly for a September evening. Its modern Irish menu typically runs about €35–60 per person before drinks, and two hours makes a comfortable finale to the day. It is centrally located, so you can walk from the harbor rather than move the car; Kenmare’s streets are compact, but pavements can be uneven, and many restaurants fill early.