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BOSTON MARATHON 2025

Shannon O'Neill

Bib: 27228•F

NY

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 48%
Gender (Female)
#0 / 12228
Top 33%
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:24
Rank: #15297
Start → 5K
7:51/mi
24:24 split
10K· 6.21 mi
48:30
Rank: #14840 (+457)
5K → 10K
7:45/mi
24:06 split
15K· 9.32 mi
1:12:54
Rank: #14822 (+18)
10K → 15K
7:51/mi
24:24 split
20K· 12.43 mi
1:37:30
Rank: #14640 (+182)
15K → 20K
7:55/mi
24:36 split
Half· 13.11 mi
1:42:50
Rank: #14618 (+22)
20K → Half
7:49/mi
5:20 split
25K· 15.53 mi
2:02:22
Rank: #14528 (+90)
Half → 25K
8:03/mi
19:32 split
30K· 18.64 mi
2:28:08
Rank: #14253 (+275)
25K → 30K
8:18/mi
25:46 split
20M
2:39:30
Rank: #14117 (+136)
30K → 20M
8:22/mi
11:22 split
21M
2:48:12
Rank: #13928 (+189)
20M → 21M
8:42/mi
8:42 split
35K· 21.75 mi
2:54:21
Rank: #13904 (+24)
21M → 35K
8:13/mi
6:09 split
23M
3:04:59
Rank: #13860 (+44)
35K → 23M
8:30/mi
10:38 split
24M
3:13:10
Rank: #13785 (+75)
23M → 24M
8:11/mi
8:11 split
40K· 24.85 mi
3:20:24
Rank: #13739 (+46)
24M → 40K
8:28/mi
7:14 split
25.2M
3:23:29
Rank: #13698 (+41)
40K → 25.2M
8:56/mi
3:05 split
Finish· 26.22 mi
3:31:09
Rank: #13525 (+173)
25.2M → Finish
7:31/mi
7:40 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:50
Pace7:51 /mi
2nd Half
Distance13.11 mi
Time1:48:19
Pace8:16 /mi
📊Positive Split: 5.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:41:0124:247:5124:24
7:51
-
10K
6.21 mi12:05:0748:307:4824:06
7:45
-0:06
15K
9.32 mi12:29:311:12:547:4924:24
7:51
+0:06
20K
12.43 mi12:54:071:37:307:5124:36
7:55
+0:04
Half
13.11 mi12:59:271:42:507:515:20
7:49
-0:06
25K
15.53 mi13:18:592:02:227:5319:32
8:03
+0:14
30K
18.64 mi13:44:452:28:087:5725:46
8:18
+0:15
20M
20.00 mi13:56:072:39:307:5811:22
8:22
+0:04
21M
21.00 mi14:04:492:48:128:018:42
8:42
+0:20
35K
21.75 mi14:10:582:54:218:016:09
8:13
-0:29
23M
23.00 mi14:21:363:04:598:0310:38
8:30
+0:17
24M
24.00 mi14:29:473:13:108:038:11
8:11
-0:19
40K
24.85 mi14:37:013:20:248:047:14
8:28
+0:17
25.2M
25.20 mi14:40:063:23:298:043:05
8:56
+0:28
Finish
26.22 mi14:47:463:31:098:047:40
7:31
-1:25

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

7:31 /mi

Average Pace

8:04 /mi

Slowest Pace

8:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:24:22

68% of race

Time at Steady Pace

1:03:42

30% of race

Time at Slower Pace

3:05

1% of race

Average Pace: 8:03 /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 mi11:41:0124:247:5124:24
7:51
#15297
10K
6.21 mi12:05:0748:307:4824:06
7:45
#14840
15K
9.32 mi12:29:311:12:547:4924:24
7:51
#14822
20K
12.43 mi12:54:071:37:307:5124:36
7:55
#14640
Half
13.11 mi12:59:271:42:507:515:20
7:49
#14618
25K
15.53 mi13:18:592:02:227:5319:32
8:03
#14528
30K
18.64 mi13:44:452:28:087:5725:46
8:18
#14253
20M
20.00 mi13:56:072:39:307:5811:22
8:22
#14117
21M
21.00 mi14:04:492:48:128:018:42
8:42
#13928
35K
21.75 mi14:10:582:54:218:016:09
8:13
#13904
23M
23.00 mi14:21:363:04:598:0310:38
8:30
#13860
24M
24.00 mi14:29:473:13:108:038:11
8:11
#13785
40K
24.85 mi14:37:013:20:248:047:14
8:28
#13739
25.2M
25.20 mi14:40:063:23:298:043:05
8:56
#13698
Finish
26.22 mi14:47:463:31:098:047:40
7:31
#13525
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi152974712471214854(Top 52%)4500(Top 37%)4500(Top 82%)
10K6.21 mi3.10 mi14840+4574454+2584454+25814419(Top 51%)4201(Top 34%)4201(Top 77%)
15K9.32 mi3.11 mi14822+184448+64448+614854(Top 52%)4500(Top 37%)4500(Top 82%)
20K12.43 mi3.11 mi14640+1824367+814367+8114264(Top 50%)4228(Top 35%)4228(Top 77%)
Half13.11 mi0.68 mi14618+224359+84359+814447(Top 51%)4312(Top 35%)4312(Top 79%)
25K15.53 mi2.42 mi14528+904349+104349+1014327(Top 50%)4380(Top 36%)4380(Top 80%)
30K18.64 mi3.11 mi14253+2754253+964253+9613465(Top 47%)4090(Top 33%)4090(Top 75%)
20M20.00 mi1.36 mi14117+1364203+504203+5012948(Top 46%)3946(Top 32%)3946(Top 72%)
21M21.00 mi1.00 mi13928+1894128+754128+7511713(Top 41%)3463(Top 28%)3463(Top 63%)
35K21.75 mi0.75 mi13904+244132-44132-413781(Top 49%)4561(Top 37%)4561(Top 83%)
23M23.00 mi1.25 mi13860+444149-174149-1713282(Top 47%)4420(Top 36%)4420(Top 81%)
24M24.00 mi1.00 mi13785+754140+94140+912485(Top 44%)4039(Top 33%)4039(Top 74%)
40K24.85 mi0.85 mi13739+464143-34143-313200(Top 46%)4545(Top 37%)4545(Top 83%)
25.2M25.20 mi0.35 mi13698+414131+124131+1211542(Top 41%)3779(Top 31%)3779(Top 69%)
Finish26.22 mi1.02 mi13525+1734054+774054+779406(Top 33%)2734(Top 22%)2734(Top 50%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21stories
+97ft-345ft

Overall

14854

Females

4500

F18-39

4500

5K→10K

3.1 - 6.2 mi

Top 51%
×5stories
+79ft-138ft

Overall

14419

Females

4201

F18-39

4201

10K→15K

6.2 - 9.3 mi

Top 52%
×3stories
+67ft-78ft

Overall

14854

Females

4500

F18-39

4500

15K→20K

9.3 - 12.4 mi

Top 50%
×5stories
+106ft-86ft

Overall

14264

Females

4228

F18-39

4228

20K→Half

12.4 - 13.1 mi

Top 51%
×2stories
+19ft-37ft

Overall

14447

Females

4312

F18-39

4312

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

14327

Females

4380

F18-39

4380

25K→30K

15.5 - 18.6 mi

Top 47%
×9stories
+181ft-148ft

Overall

13465

Females

4090

F18-39

4090

30K→20M

18.6 - 20.0 mi

Top 46%
×5stories
+64ft-50ft

Overall

12948

Females

3946

F18-39

3946

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

11713

Females

3463

F18-39

3463

21M→35K

21.0 - 21.8 mi

Top 49%
×7stories
+17ft-86ft

Overall

13781

Females

4561

F18-39

4561

35K→23M

21.8 - 23.0 mi

Top 47%
×5stories
+23ft-63ft

Overall

13282

Females

4420

F18-39

4420

23M→24M

23.0 - 24.0 mi

Top 44%
×6stories
+12ft-82ft

Overall

12485

Females

4039

F18-39

4039

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

13200

Females

4545

F18-39

4545

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

11542

Females

3779

F18-39

3779

25.2M→Finish

25.2 - 26.2 mi

Top 33%
×2stories
+22ft-21ft

Overall

9406

Females

2734

F18-39

2734

Passing Analysis

Category:
Athletes Passed
2760
Passed By
988
Net Change
+1772
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15297
5K → 10K569112+457#15297#14840
10K → 15K206188+18#14840#14822
15K → 20K285103+182#14822#14640
20K → Half4725+22#14640#14618
Half → 25K215125+90#14618#14528
25K → 30K386111+275#14528#14253
30K → 20M17539+136#14253#14117
20M → 21M21425+189#14117#13928
21M → 35K7046+24#13928#13904
35K → 23M13591+44#13904#13860
23M → 24M11843+75#13860#13785
24M → 40K10155+46#13785#13739
40K → 25.2M5716+41#13739#13698
25.2M → Finish1829+173#13698#13525
TOTALS2760988+1772
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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