MCRRC Riley's Rumble Half Marathon
Riley's Rumble Half Marathon offers a challenging summer run with a dedicated local following.
Race Date
Jul 26, 2026
Location
Boyds, MD
Quick facts
- Date
- Sunday, July 26, 2026
- Location
- Boyds, Maryland
- Distance
- Half marathon (13.1 mi)
- Course
- Loop Course
- Terrain
- Road
- USATF certified
- Yes
- Finishers on record
- 11,108
Highlights
Good For
Atmosphere
Course
The Experience
The MCRRC Riley's Rumble Half Marathon, first run in 1999 and now in its 25th year, is a local institution. It draws runners from around 11 states, with about half of its ~316 recent finishers returning year after year.
The course is described as challenging, with organizers leaning into the reality of summer running in the DC area, complete with heat, humidity, and hills. While the official elevation data suggests a flat profile, runner feedback often points to a demanding effort.
This is a low-key event, part of a free series for MCRRC members, fostering a community feel. The typical winning time of around 77 minutes indicates a competitive field, but the overall atmosphere is more about personal challenge and shared effort than elite performance.
Race-provided description
ARE YOU READY TO RUMBLE? Welcome to the registration page for the MCRRC Riley’s Rumble Half Marathon! This page may also be used to sign up to volunteer - please see the "volunteer" tab to the left. This race is part of our free, low-key race series for members. Please refer to the "Low-Key Race Entry Procedure" on our website for more information.
Logistics
Race Day
Sunday, July 26, 2026
Start Time
7:30 AM
Start Location
South Germantown Recreational Park – Maryland SoccerPlex, Boyds, MD, 20841
Course Info
USATF CertifiedCourse Type
Loop Course
Terrain
road
Surface
Paved
Difficulty
Hilly
Net Drop/km
-0.09 m
Separation
0.1%
USATF Certified Course
MD26004NP · Riley's Rumble Half Marathon
Relatively flat with minimal net elevation change. Loop course — start and finish are close together.
Course Map
Quality Score
Runner Favorite8125 years running
~338 finishers a year
shrinking
50% returning runners
USATF certified · 5 timing sources · 8 photos
runners from 11 states
winner 1:17:24
typical high 91°F
Race Day Weather
5-year historical avgStart (Low)
70°
Afternoon (High)
91°
Hot conditions — adjust pace expectations, prioritize hydration
0.1"
Precipitation
9 mph
Wind
69%
Humidity
Historical Finish Times
How 11,108 finishers actually crossed the line across 25 years.
Most recent
2025
Total finishers
11,108
Median time
2:22:01
Latest turnout
316
States
38
Turnout by year
2017–2025
Hover the histogram to inspect specific finish times.
Race Photos
Frequently asked
When is the MCRRC Riley's Rumble Half Marathon?
The MCRRC Riley's Rumble Half Marathon is held on Sunday, July 26, 2026, starting at 7:30 AM.
Where does the MCRRC Riley's Rumble Half Marathon take place?
It takes place in Boyds, Maryland.
What distances does the MCRRC Riley's Rumble Half Marathon offer?
The half marathon (13.1 miles).
Is the MCRRC Riley's Rumble Half Marathon course flat and good for a PR?
The MCRRC Riley's Rumble Half Marathon is a hilly, loop course course. The course is USATF-certified, so finish times can be used for qualifying.
How many people run the MCRRC Riley's Rumble Half Marathon?
HalfRuns has finish records for 11,108 runners who have completed the MCRRC Riley's Rumble Half Marathon.
HalfRuns editorial — independent, no paid placement.
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