Skrilo Marsh (スクリロ湿原, Sukuriro Shitsugen) is a location in Genso Suikoden Tsumugareshi Hyakunen no Toki.
During the HIY 300 Teras Pharma conflict, numerous Teras Pharma started appearing in the marsh, posing a threat to Ionian villages as well as the featherfolk town of Gugleion. This sudden influx of Teras Pharma was also the first clue as to the new whereabouts of Ionia's Teras Pharma facilities at the Tower of Zoe.
The Company would also come across slain Vermilion Axe members in the marsh, further indicating the change in history.
- Genso Suikoden Tsumugareshi Hyakunen no Toki The Complete Guide (ISBN 978-4-04-886462-6), page 122