This dirt double-track can get muddy in spring, but usually makes for good running. It's also popular with mountain bikers.
The nearby Ski Loop Trail is an opportunity to cut across and join the Summit Trail if you like. But like most trails that are labeled for skiers, the Ski Loop Trail is only pleasant when the ground is frozen and covered by snow. During summer it's a boggy, muddy, and mosquito-heavy mess. So, you might prefer turning around here and running back the way you came to creating a loop. If you want more distance, you can keep running on the Wickersham Creek Trail: It continues for so long that you could run an entire marathon distance on it without reaching the end.