Isaac O'Brien

Boston, MA

Bib: 6669 M

0:00

0:00

/ mi

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Overall

#0 / 30047

Top 1%

Gender (Male)

#0 / 17709

Top 2%

Division (M25-29)

#0 / 2720

Top 3%

Race Day Weather

42°/32°F

broken clouds

Race Timeline

Ribbon color based on

FasterSteadySlower· vs. your average pace

Start

0:00

Race begins

27 ft elev

5K· 3.11 mi

6:32/mi

20:19

↑ 279 ft↓ 164 ft0.7% grade

140 ft elev

10K· 6.21 mi

6:15/mi

39:45

↑ 103 ft↓ 217 ft0.7% grade

25 ft elev

15K· 9.32 mi

6:23/mi

59:34

↑ 51 ft↓ 55 ft

21 ft elev

21K· 13.05 mi

6:41/mi

1:24:29

↑ 20 ft↓ 37 ft

4 ft elev

25K· 15.53 mi

6:33/mi

1:40:45

↑ 35 ft0.2% grade

30 ft elev

30K· 18.64 mi

6:44/mi

2:01:40

↑ 58 ft↓ 57 ft

30 ft elev

35K· 21.75 mi

7:04/mi

2:23:38

↑ 98 ft↓ 92 ft

36 ft elev

40K· 24.85 mi

7:30/mi

2:46:57

↑ 36 ft↓ 53 ft0.1% grade

18 ft elev

Finish· 26.22 mi

7:51/mi

2:57:39

↑ 80 ft↓ 24 ft0.8% grade

74 ft elev

Course Elevation

3–237 ft

≈

×20story building

•▲ 764 ft climb · ▼ 717 ft descent

The Course

Half Splits

1st Half· via 21K

1:24:296:28 /mi⚡ faster

2nd Half

1:33:107:04 /mi+10.3%

Positive split — 10.3% slower in the second half

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Checkpoint Splits

Checkpoint	Time	Avg Pace	Segment Length	Segment Time	Segment Pace	Diff
5K	20:19	6:32	3.11 mi	20:19	6:32	-
10K	39:45	6:24	3.10 mi	19:26	6:15	-0:17
15K	59:34	6:23	3.11 mi	19:49	6:23	+0:08
21K	1:24:29	6:28	3.73 mi	24:55	6:41	+0:18
25K	1:40:45	6:29	2.48 mi	16:16	6:33	-0:08
30K	2:01:40	6:32	3.11 mi	20:55	6:44	+0:11
35K	2:23:38	6:36	3.11 mi	21:58	7:04	+0:20
40K	2:46:57	6:43	3.10 mi	23:19	7:30	+0:26
Finish(26.22 mi)	2:57:39	6:47	1.37 mi	10:42	7:51	+0:21

Trend:

Faster pace

Steady pace

Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

6:15 /mi

Average Pace

6:47 /mi

Slowest Pace

7:51 /mi

Loading chart...

Fastest

Middle

Slowest

Average

Segments

Time at Faster Pace

39:15

22% of race

Time at Steady Pace

1:22:25

46% of race

Time at Slower Pace

55:59

32% of race

Average Pace: 6:47 /mi

Loading chart...

Faster pace (< avg)

Steady pace (≈ avg)

Slower pace (> avg)

Heatmap

0mi6.6mi13.1mi19.7mi26.2mi

Pace:

Faster

Steady

Slower

Checkpoint and Segment Rankings

Checkpoint	Seg. Dist	Overall	Males	M25-29	Seg. Overall	Seg. Males	Seg. M25-29
5K	3.11 mi	148	144	41	229	220	62
10K	3.10 mi	170-22	166-22	47-6	185	180	51
15K	3.11 mi	175-5	171-5	49-2	229	220	62
21K	3.73 mi	199-24	194-23	60-11	307	295	85
25K	2.48 mi	230-31	224-30	71-11	384	363	107
30K	3.11 mi	237-7	230-6	72-1	339	318	93
35K	3.11 mi	259-22	251-21	76-4	524	486	131
40K	3.10 mi	302-43	290-39	83-7	830	708	176
Finish(26.22 mi)	1.37 mi	328-26	312-22	91-8	1263	1002	246

1002

Passing Analysis

Category:

▼Net Change

0 passed by0* passed

Segment	Movement	Rank
Start → 5K	-	#148
5K → 10K	242-22	#148 → #170
10K → 15K	94-5	#170 → #175
15K → 21K	262*-24	#175 → #199
21K → 25K	343-31	#199 → #230
25K → 30K	147*-7	#230 → #237
30K → 35K	264-22	#237 → #259
35K → 40K	452-43	#259 → #302
40K → Finish	326*-26	#302 → #328
TOTALS	21030*-180	#148 → #328

* Includes athletes who did not complete a segment (DNF/DNQ).

Passing Visualized

Category:

Passing Circle

Position Flow

Race Lanes

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Results processed 18 days ago

Public Race Data

Enhanced athlete results built from publicly available data.

Race managed by

U.S. Marine Corps Community Services (MCCS)

Race timed by

Timing Productions