Delaware · Half Marathon
Half Marathons in Delaware
Delaware currently has 11 upcoming half marathons with a confirmed date listed in RaceRove. Lewes, Newark, Wilmington and Rehoboth Beach have the largest concentration of events.
March (3), April (2) and May (2) are the busiest months on the calendar right now. Another 1 annual half marathon is waiting for next year's date to be announced.
- Upcoming, date confirmed
- 11
- Active listings
- 12
- Cities with races
- 7
More ways to browse Delaware
Upcoming half marathons in Delaware
All 11 with a confirmed date, soonest first.
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Rehoboth Beach Seashore Marathon & Half MarathonRehoboth Beach, DEMarathonHalf Marathon ~3,000 runners
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Shamrock Shuffle Half Marathon, 5K & 2-Person RelayLewes, DEHalf Marathon5K2-Person Relay ~250 runners
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Seashore Classic Half Marathon, 2-Person Relay & 5KLewes, DEHalf Marathon2-Person Relay5K ~300 runners
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Race4Warriors 5K, 10K & Half Marathon ChallengesLewes, DEHalf Marathon10K5K (RunRace-Walk +1 more ~800 runners
Dates come from each race's own listing. Always confirm on the organiser's site before you book travel.
Largest half marathon events in Delaware
By estimated field size across all distances at the event.
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Rehoboth Beach Seashore Marathon & Half MarathonRehoboth Beach, DEMarathonHalf Marathon ~3,000 runners
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Race4Warriors 5K, 10K & Half Marathon ChallengesLewes, DEHalf Marathon10K5K (RunRace-Walk +1 more ~800 runners
When half marathons happen in Delaware
- March
- 3 upcoming races
- April
- 2 upcoming races
- May
- 2 upcoming races
- September
- 1 upcoming race
- October
- 2 upcoming races
- December
- 1 upcoming race
Delaware cities with the most half marathons
- Lewes
- 3 upcoming races
- Newark
- 2 upcoming races
- Wilmington
- 2 upcoming races
- Rehoboth Beach
- 1 upcoming race
- Bear
- 1 upcoming race
- Dewey Beach
- 1 upcoming race
- Dover
- 1 upcoming race
Annual events awaiting their next date
These half marathons are held every year, but the next date isn't in the listing yet. The month shown is when each is usually held.
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Seawitch Fall Half Marathon Classic & 5KRehoboth Beach, DE Usually held in October · next date not announcedHalf Marathon5K1 Mile Fright Walk ~500 runners
Half Marathons in nearby states
Guides from the RaceRove blog
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 8 min read How to Choose the Best Half Marathon for a PR, Racecation or 50-State Challenge The best half marathon depends on what you want from it. How to choose a course for a personal record, a race worth travelling for, or an efficient stop on a 50-state challenge.
- 4 min read Diplo's Run Club 2026-27: Every City, Date and Course Diplo's Run Club is a 5K with a post-race concert. Every US date for 2026-27 (San Francisco, New York, Los Angeles, San Diego and Phoenix), start times and courses.
- Blog All guides Planning advice for finding, choosing and travelling to races.
Half Marathons in Delaware: common questions
- How many half marathons are there in Delaware?
- RaceRove currently lists 11 upcoming half marathons in Delaware with a confirmed date, plus 1 annual event whose next date hasn't been announced yet.
- How long is a half marathon?
- A half marathon is 13.1 miles (21.1 kilometres).
- Which Delaware cities have the most half marathons?
- By upcoming events listed in RaceRove: Lewes (3), Newark (2), Wilmington (2), Rehoboth Beach (1) and Bear (1).
- When is half marathon season in Delaware?
- Of the upcoming half marathons listed, the busiest months are March (3), April (2) and May (2).
- What is the biggest half marathon in Delaware?
- By estimated field size, the largest event with a half marathon listed in Delaware is the Rehoboth Beach Seashore Marathon & Half Marathon, with about 3,000 runners across all of its distances.
Search every half marathon in Delaware
Filter by month, course profile and field size, save races to a shortlist and compare them side by side in the interactive search.