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BOSTON MARATHON 2025

Erin Kilduff

Bib: 18102•F

RI

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 45%
Masters (Masters Women)
#0 / 6759
Top 32%
Division (F50-54)
#0 / 1303
Top 25%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:38
Rank: #16011
Start → 5K
24:38 | 7:56/mi
10K· 6.21 mi
49:12
Rank: #15868 (+143)
5K → 10K
24:34 | 7:54/mi
15K· 9.32 mi
1:13:21
Rank: #15240 (+628)
10K → 15K
24:09 | 7:46/mi
20K· 12.43 mi
1:37:50
Rank: #14864 (+376)
15K → 20K
24:29 | 7:53/mi
Half· 13.11 mi
1:43:09
Rank: #14823 (+41)
20K → Half
5:19 | 7:48/mi
25K· 15.53 mi
2:02:59
Rank: #14882 (-59)
Half → 25K
19:50 | 8:11/mi
30K· 18.64 mi
2:29:58
Rank: #15106 (-224)
25K → 30K
26:59 | 8:41/mi
20M
2:42:09
Rank: #15205 (-99)
30K → 20M
12:11 | 8:58/mi
21M
2:51:45
Rank: #15239 (-34)
20M → 21M
9:36 | 9:36/mi
35K· 21.75 mi
2:58:39
Rank: #15419 (-180)
21M → 35K
6:54 | 9:13/mi
23M
3:10:27
Rank: #15593 (-174)
35K → 23M
11:48 | 9:25/mi
24M
3:19:57
Rank: #15766 (-173)
23M → 24M
9:30 | 9:30/mi
40K· 24.85 mi
3:28:12
Rank: #15922 (-156)
24M → 40K
8:15 | 9:39/mi
25.2M
3:31:45
Rank: #15971 (-49)
40K → 25.2M
3:33 | 10:18/mi
Finish· 26.22 mi
3:41:07
Rank: #16143 (-172)
25.2M → Finish
9:22 | 9:11/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:09
Pace7:52 /mi
2nd Half
Distance13.11 mi
Time1:57:58
Pace9:00 /mi
📊Positive Split: 14.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:5524:387:5624:38
7:56
-
10K
6.21 mi11:40:2949:127:5524:34
7:54
-0:02
15K
9.32 mi12:04:381:13:217:5224:09
7:46
-0:08
20K
12.43 mi12:29:071:37:507:5224:29
7:53
+0:07
Half
13.11 mi12:34:261:43:097:525:19
7:48
-0:05
25K
15.53 mi12:54:162:02:597:5519:50
8:11
+0:23
30K
18.64 mi13:21:152:29:588:0326:59
8:41
+0:30
20M
20.00 mi13:33:262:42:098:0612:11
8:58
+0:17
21M
21.00 mi13:43:022:51:458:119:36
9:36
+0:38
35K
21.75 mi13:49:562:58:398:136:54
9:13
-0:23
23M
23.00 mi14:01:443:10:278:1711:48
9:25
+0:12
24M
24.00 mi14:11:143:19:578:209:30
9:30
+0:05
40K
24.85 mi14:19:293:28:128:238:15
9:39
+0:09
25.2M
25.20 mi14:23:023:31:458:243:33
10:18
+0:39
Finish
26.22 mi14:32:243:41:078:269:22
9:11
-1:07

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

7:46 /mi

Average Pace

8:26 /mi

Slowest Pace

10:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:02:59

56% of race

Time at Steady Pace

55:26

25% of race

Time at Slower Pace

42:42

19% of race

Average Pace: 8:26 /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 mi11:15:5524:387:5624:38
7:56
#16011
10K
6.21 mi11:40:2949:127:5524:34
7:54
#15868
15K
9.32 mi12:04:381:13:217:5224:09
7:46
#15240
20K
12.43 mi12:29:071:37:507:5224:29
7:53
#14864
Half
13.11 mi12:34:261:43:097:525:19
7:48
#14823
25K
15.53 mi12:54:162:02:597:5519:50
8:11
#14882
30K
18.64 mi13:21:152:29:588:0326:59
8:41
#15106
20M
20.00 mi13:33:262:42:098:0612:11
8:58
#15205
21M
21.00 mi13:43:022:51:458:119:36
9:36
#15239
35K
21.75 mi13:49:562:58:398:136:54
9:13
#15419
23M
23.00 mi14:01:443:10:278:1711:48
9:25
#15593
24M
24.00 mi14:11:143:19:578:209:30
9:30
#15766
40K
24.85 mi14:19:293:28:128:238:15
9:39
#15922
25.2M
25.20 mi14:23:023:31:458:243:33
10:18
#15971
Finish
26.22 mi14:32:243:41:078:269:22
9:11
#16143
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi160115159515914157(Top 50%)4114(Top 34%)4114(Top 316%)
10K6.21 mi3.10 mi15868+1435060+995060+9915728(Top 55%)4967(Top 41%)4967(Top 381%)
15K9.32 mi3.11 mi15240+6284701+3594701+35914157(Top 50%)4114(Top 34%)4114(Top 316%)
20K12.43 mi3.11 mi14864+3764513+1884513+18813949(Top 49%)4069(Top 33%)4069(Top 312%)
Half13.11 mi0.68 mi14823+414489+244489+2414308(Top 50%)4259(Top 35%)4259(Top 327%)
25K15.53 mi2.42 mi14882-594557-684557-6815196(Top 53%)4851(Top 40%)4851(Top 372%)
30K18.64 mi3.11 mi15106-2244729-1724729-17215911(Top 56%)5412(Top 44%)5412(Top 415%)
20M20.00 mi1.36 mi15205-994813-844813-8416619(Top 59%)5927(Top 48%)5927(Top 455%)
21M21.00 mi1.00 mi15239-344862-494862-4916564(Top 58%)6010(Top 49%)6010(Top 461%)
35K21.75 mi0.75 mi15419-1804986-1244986-12419272(Top 68%)7581(Top 62%)7581(Top 582%)
23M23.00 mi1.25 mi15593-1745126-1405126-14018351(Top 65%)7158(Top 59%)7158(Top 549%)
24M24.00 mi1.00 mi15766-1735249-1235249-12319635(Top 69%)7896(Top 65%)7896(Top 606%)
40K24.85 mi0.85 mi15922-1565361-1125361-11219276(Top 68%)7767(Top 64%)7767(Top 596%)
25.2M25.20 mi0.35 mi15971-495401-405401-4018290(Top 64%)7278(Top 60%)7278(Top 559%)
Finish26.22 mi1.02 mi16143-1725515-1145515-11419915(Top 70%)8096(Top 66%)8096(Top 621%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21stories
+97ft-345ft

Overall

14157

Females

4114

F50-54

4114

5K→10K

3.1 - 6.2 mi

Top 55%
×5stories
+79ft-138ft

Overall

15728

Females

4967

F50-54

4967

10K→15K

6.2 - 9.3 mi

Top 50%
×3stories
+67ft-78ft

Overall

14157

Females

4114

F50-54

4114

15K→20K

9.3 - 12.4 mi

Top 49%
×5stories
+106ft-86ft

Overall

13949

Females

4069

F50-54

4069

20K→Half

12.4 - 13.1 mi

Top 50%
×2stories
+19ft-37ft

Overall

14308

Females

4259

F50-54

4259

Half→25K

13.1 - 15.5 mi

Top 53%
×4stories
+66ft-88ft

Overall

15196

Females

4851

F50-54

4851

25K→30K

15.5 - 18.6 mi

Top 56%
×9stories
+181ft-148ft

Overall

15911

Females

5412

F50-54

5412

30K→20M

18.6 - 20.0 mi

Top 59%
×5stories
+64ft-50ft

Overall

16619

Females

5927

F50-54

5927

20M→21M

20.0 - 21.0 mi

Top 58%
×8stories
+106ft-24ft

Overall

16564

Females

6010

F50-54

6010

21M→35K

21.0 - 21.8 mi

Top 68%
×7stories
+17ft-86ft

Overall

19272

Females

7581

F50-54

7581

35K→23M

21.8 - 23.0 mi

Top 65%
×5stories
+23ft-63ft

Overall

18351

Females

7158

F50-54

7158

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

19635

Females

7896

F50-54

7896

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

19276

Females

7767

F50-54

7767

40K→25.2M

24.9 - 25.2 mi

Top 64%
×1story
+13ft-16ft

Overall

18290

Females

7278

F50-54

7278

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2stories
+22ft-21ft

Overall

19915

Females

8096

F50-54

8096

Passing Analysis

Category:
Athletes Passed
2246
Passed By
2378
Net Change
-132
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16011
5K → 10K398255+143#16011#15868
10K → 15K64517+628#15868#15240
15K → 20K41034+376#15240#14864
20K → Half5918+41#14864#14823
Half → 25K164223-59#14823#14882
25K → 30K177401-224#14882#15106
30K → 20M88187-99#15106#15205
20M → 21M104138-34#15205#15239
21M → 35K27207-180#15239#15419
35K → 23M67241-174#15419#15593
23M → 24M25198-173#15593#15766
24M → 40K37193-156#15766#15922
40K → 25.2M2069-49#15922#15971
25.2M → Finish25197-172#15971#16143
TOTALS22462378-132
📊

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