Course
The race starts at 6:45 a.m., just before sunrise, from the Metro overpass at Redland Road and Somerville Drive in Rockville. It leaves Montgomery County road quickly and turns into a tour of Rock Creek Park under tree cover, finishing at a festival area.
Half Marathon21.1 km
Key dates
- ★Race daySeptember 2027 · date to be announced
Provisional date, projected from last year — the organiser has not announced this edition yet. We show the month only.
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Save Parks Half Marathon to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
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Metric Marathon
A marathon measured in kilometers, not miles
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Matthew Henson 5K
Named for Arctic explorer Matthew Henson
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A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.