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BOSTON MARATHON 2025

Jamie O'Sullivan

Bib: 6571•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 20%
Gender (Male)
#0 / 16105
Top 32%
Masters (Masters Men)
#0 / 10463
Top 18%
Division (M45-49)
#0 / 2386
Top 24%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:29
Rank: #4533
Start → 5K
20:29 | 6:36/mi
10K· 6.21 mi
41:02
Rank: #4533
5K → 10K
20:33 | 6:37/mi
15K· 9.32 mi
1:01:48
Rank: #4634 (-101)
10K → 15K
20:46 | 6:41/mi
20K· 12.43 mi
1:22:57
Rank: #4774 (-140)
15K → 20K
21:09 | 6:48/mi
Half· 13.11 mi
1:27:35
Rank: #4840 (-66)
20K → Half
4:38 | 6:47/mi
25K· 15.53 mi
1:44:18
Rank: #4928 (-88)
Half → 25K
16:43 | 6:54/mi
30K· 18.64 mi
2:06:48
Rank: #5183 (-255)
25K → 30K
22:30 | 7:15/mi
20M
2:16:52
Rank: #5302 (-119)
30K → 20M
10:04 | 7:24/mi
21M
2:24:52
Rank: #5424 (-122)
20M → 21M
8:00 | 8:00/mi
35K· 21.75 mi
2:30:13
Rank: #5432 (-8)
21M → 35K
5:21 | 7:09/mi
23M
2:39:44
Rank: #5468 (-36)
35K → 23M
9:31 | 7:36/mi
24M
2:47:32
Rank: #5568 (-100)
23M → 24M
7:48 | 7:48/mi
40K· 24.85 mi
2:54:07
Rank: #5598 (-30)
24M → 40K
6:35 | 7:42/mi
25.2M
2:57:08
Rank: #5621 (-23)
40K → 25.2M
3:01 | 8:45/mi
Finish· 26.22 mi
3:05:03
Rank: #5764 (-143)
25.2M → Finish
7:55 | 7:46/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:35
Pace6:41 /mi
2nd Half
Distance13.11 mi
Time1:37:28
Pace7:26 /mi
📊Positive Split: 11.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:0820:296:3620:29
6:36
-
10K
6.21 mi10:45:4141:026:3620:33
6:37
+0:01
15K
9.32 mi11:06:271:01:486:3820:46
6:41
+0:04
20K
12.43 mi11:27:361:22:576:4021:09
6:48
+0:07
Half
13.11 mi11:32:141:27:356:414:38
6:47
-0:01
25K
15.53 mi11:48:571:44:186:4316:43
6:54
+0:07
30K
18.64 mi12:11:272:06:486:4822:30
7:15
+0:21
20M
20.00 mi12:21:312:16:526:5110:04
7:24
+0:09
21M
21.00 mi12:29:312:24:526:548:00
8:00
+0:36
35K
21.75 mi12:34:522:30:136:545:21
7:09
-0:51
23M
23.00 mi12:44:232:39:446:579:31
7:36
+0:27
24M
24.00 mi12:52:112:47:326:597:48
7:48
+0:12
40K
24.85 mi12:58:462:54:077:006:35
7:42
-0:06
25.2M
25.20 mi13:01:472:57:087:023:01
8:45
+1:03
Finish
26.22 mi13:09:423:05:037:047:55
7:46
-0:59

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

6:36 /mi

Average Pace

7:04 /mi

Slowest Pace

8:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:18

56% of race

Time at Steady Pace

37:55

20% of race

Time at Slower Pace

42:50

23% of race

Average Pace: 7:03 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:25:0820:296:3620:29
6:36
#4533
10K
6.21 mi10:45:4141:026:3620:33
6:37
#4533
15K
9.32 mi11:06:271:01:486:3820:46
6:41
#4634
20K
12.43 mi11:27:361:22:576:4021:09
6:48
#4774
Half
13.11 mi11:32:141:27:356:414:38
6:47
#4840
25K
15.53 mi11:48:571:44:186:4316:43
6:54
#4928
30K
18.64 mi12:11:272:06:486:4822:30
7:15
#5183
20M
20.00 mi12:21:312:16:526:5110:04
7:24
#5302
21M
21.00 mi12:29:312:24:526:548:00
8:00
#5424
35K
21.75 mi12:34:522:30:136:545:21
7:09
#5432
23M
23.00 mi12:44:232:39:446:579:31
7:36
#5468
24M
24.00 mi12:52:112:47:326:597:48
7:48
#5568
40K
24.85 mi12:58:462:54:077:006:35
7:42
#5598
25.2M
25.20 mi13:01:472:57:087:023:01
8:45
#5621
Finish
26.22 mi13:09:423:05:037:047:55
7:46
#5764
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi4533425942594933(Top 17%)4596(Top 29%)4596(Top 193%)
10K6.21 mi3.10 mi4533425942594582(Top 16%)4292(Top 27%)4292(Top 180%)
15K9.32 mi3.11 mi4634-1014340-814340-814933(Top 17%)4596(Top 29%)4596(Top 193%)
20K12.43 mi3.11 mi4774-1404454-1144454-1145362(Top 19%)4918(Top 31%)4918(Top 206%)
Half13.11 mi0.68 mi4840-664511-574511-576012(Top 21%)5433(Top 34%)5433(Top 228%)
25K15.53 mi2.42 mi4928-884580-694580-695610(Top 20%)5084(Top 32%)5084(Top 213%)
30K18.64 mi3.11 mi5183-2554770-1904770-1906117(Top 22%)5393(Top 33%)5393(Top 226%)
20M20.00 mi1.36 mi5302-1194858-884858-886400(Top 23%)5453(Top 34%)5453(Top 229%)
21M21.00 mi1.00 mi5424-1224955-974955-977311(Top 26%)5846(Top 36%)5846(Top 245%)
35K21.75 mi0.75 mi5432-84953+24953+26241(Top 22%)5214(Top 32%)5214(Top 219%)
23M23.00 mi1.25 mi5468-364971-184971-187220(Top 25%)5700(Top 35%)5700(Top 239%)
24M24.00 mi1.00 mi5568-1005034-635034-639757(Top 34%)7028(Top 44%)7028(Top 295%)
40K24.85 mi0.85 mi5598-305041-75041-78030(Top 28%)5992(Top 37%)5992(Top 251%)
25.2M25.20 mi0.35 mi5621-235049-85049-810176(Top 36%)7000(Top 43%)7000(Top 293%)
Finish26.22 mi1.02 mi5764-1435140-915140-9111159(Top 39%)7577(Top 47%)7577(Top 318%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 17%
×21stories
+97ft-345ft

Overall

4933

Males

4596

M45-49

4596

5K→10K

3.1 - 6.2 mi

Top 16%
×5stories
+79ft-138ft

Overall

4582

Males

4292

M45-49

4292

10K→15K

6.2 - 9.3 mi

Top 17%
×3stories
+67ft-78ft

Overall

4933

Males

4596

M45-49

4596

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

5362

Males

4918

M45-49

4918

20K→Half

12.4 - 13.1 mi

Top 21%
×2stories
+19ft-37ft

Overall

6012

Males

5433

M45-49

5433

Half→25K

13.1 - 15.5 mi

Top 20%
×4stories
+66ft-88ft

Overall

5610

Males

5084

M45-49

5084

25K→30K

15.5 - 18.6 mi

Top 22%
×9stories
+181ft-148ft

Overall

6117

Males

5393

M45-49

5393

30K→20M

18.6 - 20.0 mi

Top 23%
×5stories
+64ft-50ft

Overall

6400

Males

5453

M45-49

5453

20M→21M

20.0 - 21.0 mi

Top 26%
×8stories
+106ft-24ft

Overall

7311

Males

5846

M45-49

5846

21M→35K

21.0 - 21.8 mi

Top 22%
×7stories
+17ft-86ft

Overall

6241

Males

5214

M45-49

5214

35K→23M

21.8 - 23.0 mi

Top 25%
×5stories
+23ft-63ft

Overall

7220

Males

5700

M45-49

5700

23M→24M

23.0 - 24.0 mi

Top 34%
×6stories
+12ft-82ft

Overall

9757

Males

7028

M45-49

7028

24M→40K

24.0 - 24.9 mi

Top 28%
×1story
+6ft-20ft

Overall

8030

Males

5992

M45-49

5992

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

10176

Males

7000

M45-49

7000

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2stories
+22ft-21ft

Overall

11159

Males

7577

M45-49

7577

Passing Analysis

Category:
Athletes Passed
812
Passed By
2043
Net Change
-1231
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4533
5K → 10K1611610#4533#4533
10K → 15K72173-101#4533#4634
15K → 20K85225-140#4634#4774
20K → Half672-66#4774#4840
Half → 25K78166-88#4840#4928
25K → 30K106361-255#4928#5183
30K → 20M40159-119#5183#5302
20M → 21M38160-122#5302#5424
21M → 35K4755-8#5424#5432
35K → 23M72108-36#5432#5468
23M → 24M24124-100#5468#5568
24M → 40K3969-30#5568#5598
40K → 25.2M2346-23#5598#5621
25.2M → Finish21164-143#5621#5764
TOTALS8122043-1231
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing