PA 103's southern terminus is an at-grade intersection with US 522 at Allenport in Shirley Township, a bit south of US 522's bridge across the Juniata River in Mount Union.
pˌiːˈeɪ wˈʌnhˈʌndɹɪd θɹˈiː sˈʌðɚn tˈɜːmɪnəs ɪz ɐn ætɡɹˈeɪd ˌɪntɚsˈɛkʃən wɪð jˌuːˈɛs fˈaɪvhˈʌndɹɪd twˈɛnti tˈuː æɾ ɐlˈɛnpoːɹt ɪn ʃˈɜːli tˈaʊnʃɪp, ɐ bˈɪt sˈaʊθ ʌv jˌuːˈɛs fˈaɪvhˈʌndɹɪd twˈɛnti tˈuː bɹˈɪdʒ əkɹˌɑːs ðə dʒˌuːnɪˈɑːɾɚ ɹˈɪvɚɹ ɪn mˈaʊnt jˈuːniən.