| Area: | The Berwyns |
| County: | Powys |
| Country: | Wales |
| Classification: | HuMP and sub Marilyn (also Clem and Tump) |
| Height: | |
| Maps: | 239 Explorer or 125 Landranger |
| Grid Ref: | SJ120176 Hills nearby: 5km 10km 20km |
| Summit: | ground by concrete base of wind turbine |
| Notes: | ground SE by fence is 1.4m lower |
| Daylight: | dawn 04:25, sunrise 05:09, sunset 21:09, dusk 21:54 |
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