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BOSTON MARATHON 2025

Erin Duncan

Bib: 25802•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
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
27:58
Rank: #22409
Start → 5K
27:58 | 9:00/mi
10K· 6.21 mi
55:07
Rank: #21816 (+593)
5K → 10K
27:09 | 8:44/mi
15K· 9.32 mi
1:22:23
Rank: #21478 (+338)
10K → 15K
27:16 | 8:47/mi
20K· 12.43 mi
1:49:58
Rank: #21171 (+307)
15K → 20K
27:35 | 8:53/mi
Half· 13.11 mi
1:56:13
Rank: #21250 (-79)
20K → Half
6:15 | 9:10/mi
25K· 15.53 mi
2:20:05
Rank: #21631 (-381)
Half → 25K
23:52 | 9:51/mi
30K· 18.64 mi
2:50:44
Rank: #21586 (+45)
25K → 30K
30:39 | 9:52/mi
20M
3:03:36
Rank: #21368 (+218)
30K → 20M
12:52 | 9:28/mi
21M
3:13:25
Rank: #21173 (+195)
20M → 21M
9:49 | 9:49/mi
35K· 21.75 mi
3:20:09
Rank: #21041 (+132)
21M → 35K
6:44 | 9:00/mi
23M
3:31:57
Rank: #20900 (+141)
35K → 23M
11:48 | 9:25/mi
24M
3:41:25
Rank: #20846 (+54)
23M → 24M
9:28 | 9:28/mi
40K· 24.85 mi
3:49:59
Rank: #20835 (+11)
24M → 40K
8:34 | 10:01/mi
25.2M
3:53:40
Rank: #20798 (+37)
40K → 25.2M
3:41 | 10:41/mi
Finish· 26.22 mi
4:02:28
Rank: #20704 (+94)
25.2M → Finish
8:48 | 8:38/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:13
Pace8:52 /mi
2nd Half
Distance13.11 mi
Time2:06:15
Pace9:38 /mi
📊Positive Split: 8.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:2527:589:0027:58
9:00
-
10K
6.21 mi12:10:3455:078:5227:09
8:44
-0:16
15K
9.32 mi12:37:501:22:238:5027:16
8:47
+0:03
20K
12.43 mi13:05:251:49:588:5127:35
8:53
+0:06
Half
13.11 mi13:11:401:56:138:526:15
9:10
+0:17
25K
15.53 mi13:35:322:20:059:0123:52
9:51
+0:41
30K
18.64 mi14:06:112:50:449:1030:39
9:52
+0:01
20M
20.00 mi14:19:033:03:369:1112:52
9:28
-0:24
21M
21.00 mi14:28:523:13:259:139:49
9:49
+0:21
35K
21.75 mi14:35:363:20:099:126:44
9:00
-0:49
23M
23.00 mi14:47:243:31:579:1311:48
9:25
+0:25
24M
24.00 mi14:56:523:41:259:149:28
9:28
+0:03
40K
24.85 mi15:05:263:49:599:158:34
10:01
+0:33
25.2M
25.20 mi15:09:073:53:409:163:41
10:41
+0:40
Finish
26.22 mi15:17:554:02:289:158:48
8:38
-2:03

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

8:38 /mi

Average Pace

9:15 /mi

Slowest Pace

10:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:05:30

52% of race

Time at Steady Pace

40:23

17% of race

Time at Slower Pace

1:16:35

32% of race

Average Pace: 9:15 /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 mi11:43:2527:589:0027:58
9:00
#22409
10K
6.21 mi12:10:3455:078:5227:09
8:44
#21816
15K
9.32 mi12:37:501:22:238:5027:16
8:47
#21478
20K
12.43 mi13:05:251:49:588:5127:35
8:53
#21171
Half
13.11 mi13:11:401:56:138:526:15
9:10
#21250
25K
15.53 mi13:35:322:20:059:0123:52
9:51
#21631
30K
18.64 mi14:06:112:50:449:1030:39
9:52
#21586
20M
20.00 mi14:19:033:03:369:1112:52
9:28
#21368
21M
21.00 mi14:28:523:13:259:139:49
9:49
#21173
35K
21.75 mi14:35:363:20:099:126:44
9:00
#21041
23M
23.00 mi14:47:243:31:579:1311:48
9:25
#20900
24M
24.00 mi14:56:523:41:259:149:28
9:28
#20846
40K
24.85 mi15:05:263:49:599:158:34
10:01
#20835
25.2M
25.20 mi15:09:073:53:409:163:41
10:41
#20798
Finish
26.22 mi15:17:554:02:289:158:48
8:38
#20704
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi224098859885920925(Top 74%)7957(Top 65%)7957(Top 145%)
10K6.21 mi3.10 mi21816+5938506+3538506+35321102(Top 74%)8081(Top 66%)8081(Top 148%)
15K9.32 mi3.11 mi21478+3388290+2168290+21620925(Top 74%)7957(Top 65%)7957(Top 145%)
20K12.43 mi3.11 mi21171+3078123+1678123+16720369(Top 72%)7693(Top 63%)7693(Top 141%)
Half13.11 mi0.68 mi21250-798171-488171-4822459(Top 79%)8850(Top 72%)8850(Top 162%)
25K15.53 mi2.42 mi21631-3818397-2268397-22622881(Top 81%)9131(Top 75%)9131(Top 167%)
30K18.64 mi3.11 mi21586+458396+18396+121205(Top 75%)8343(Top 68%)8343(Top 153%)
20M20.00 mi1.36 mi21368+2188304+928304+9219058(Top 67%)7294(Top 60%)7294(Top 133%)
21M21.00 mi1.00 mi21173+1958215+898215+8917594(Top 62%)6593(Top 54%)6593(Top 121%)
35K21.75 mi0.75 mi21041+1328158+578158+5718281(Top 64%)7073(Top 58%)7073(Top 129%)
23M23.00 mi1.25 mi20900+1418110+488110+4818372(Top 65%)7179(Top 59%)7179(Top 131%)
24M24.00 mi1.00 mi20846+548093+178093+1719527(Top 69%)7841(Top 64%)7841(Top 143%)
40K24.85 mi0.85 mi20835+118108-158108-1520526(Top 72%)8422(Top 69%)8422(Top 154%)
25.2M25.20 mi0.35 mi20798+378098+108098+1019699(Top 69%)8010(Top 66%)8010(Top 146%)
Finish26.22 mi1.02 mi20704+948057+418057+4117136(Top 60%)6641(Top 54%)6641(Top 121%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21stories
+97ft-345ft

Overall

20925

Females

7957

F18-39

7957

5K→10K

3.1 - 6.2 mi

Top 74%
×5stories
+79ft-138ft

Overall

21102

Females

8081

F18-39

8081

10K→15K

6.2 - 9.3 mi

Top 74%
×3stories
+67ft-78ft

Overall

20925

Females

7957

F18-39

7957

15K→20K

9.3 - 12.4 mi

Top 72%
×5stories
+106ft-86ft

Overall

20369

Females

7693

F18-39

7693

20K→Half

12.4 - 13.1 mi

Top 79%
×2stories
+19ft-37ft

Overall

22459

Females

8850

F18-39

8850

Half→25K

13.1 - 15.5 mi

Top 81%
×4stories
+66ft-88ft

Overall

22881

Females

9131

F18-39

9131

25K→30K

15.5 - 18.6 mi

Top 75%
×9stories
+181ft-148ft

Overall

21205

Females

8343

F18-39

8343

30K→20M

18.6 - 20.0 mi

Top 67%
×5stories
+64ft-50ft

Overall

19058

Females

7294

F18-39

7294

20M→21M

20.0 - 21.0 mi

Top 62%
×8stories
+106ft-24ft

Overall

17594

Females

6593

F18-39

6593

21M→35K

21.0 - 21.8 mi

Top 64%
×7stories
+17ft-86ft

Overall

18281

Females

7073

F18-39

7073

35K→23M

21.8 - 23.0 mi

Top 65%
×5stories
+23ft-63ft

Overall

18372

Females

7179

F18-39

7179

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

19527

Females

7841

F18-39

7841

24M→40K

24.0 - 24.9 mi

Top 72%
×1story
+6ft-20ft

Overall

20526

Females

8422

F18-39

8422

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

19699

Females

8010

F18-39

8010

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2stories
+22ft-21ft

Overall

17136

Females

6641

F18-39

6641

Passing Analysis

Category:
Athletes Passed
2755
Passed By
1050
Net Change
+1705
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22409
5K → 10K66673+593#22409#21816
10K → 15K41173+338#21816#21478
15K → 20K36659+307#21478#21171
20K → Half1190-79#21171#21250
Half → 25K59440-381#21250#21631
25K → 30K223178+45#21631#21586
30K → 20M2257+218#21586#21368
20M → 21M20712+195#21368#21173
21M → 35K1419+132#21173#21041
35K → 23M15716+141#21041#20900
23M → 24M8733+54#20900#20846
24M → 40K5241+11#20846#20835
40K → 25.2M4710+37#20835#20798
25.2M → Finish1039+94#20798#20704
TOTALS27551050+1705
📊

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