Complex sentence: A spur road of the Seward Highway takes visitors to the only road accessible portion of the Kenai Fjords National Park and a number of hiking trails that take visitors to the terminus of the glacier or even up to the Harding Icefield itself.
Split into simpler sentences: A spur road of the Seward Highway leads to the only road accessible portion of the Kenai Fjords National Park. A system of hiking trails lead to the terminus of the glacier and up to the Harding Icefield itself.