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BOSTON MARATHON 2025

Heather Mcdonald

Bib: 27943•F

NH

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
26:42
Rank: #20434
Start → 5K
8:36/mi
26:42 split
10K· 6.21 mi
52:51
Rank: #19873 (+561)
5K → 10K
8:25/mi
26:09 split
15K· 9.32 mi
1:19:46
Rank: #20021 (-148)
10K → 15K
8:40/mi
26:55 split
20K· 12.43 mi
1:48:25
Rank: #20553 (-532)
15K → 20K
9:13/mi
28:39 split
Half· 13.11 mi
1:54:47
Rank: #20704 (-151)
20K → Half
9:20/mi
6:22 split
25K· 15.53 mi
2:19:27
Rank: #21460 (-756)
Half → 25K
10:10/mi
24:40 split
30K· 18.64 mi
2:53:41
Rank: #22223 (-763)
25K → 30K
11:01/mi
34:14 split
20M
3:07:19
Rank: #22139 (+84)
30K → 20M
10:02/mi
13:38 split
21M
3:18:06
Rank: #22028 (+111)
20M → 21M
10:47/mi
10:47 split
35K· 21.75 mi
3:25:01
Rank: #21925 (+103)
21M → 35K
9:15/mi
6:55 split
23M
3:38:22
Rank: #21932 (-7)
35K → 23M
10:40/mi
13:21 split
24M
3:48:41
Rank: #21948 (-16)
23M → 24M
10:19/mi
10:19 split
40K· 24.85 mi
3:57:47
Rank: #21953 (-5)
24M → 40K
10:39/mi
9:06 split
25.2M
4:01:28
Rank: #21922 (+31)
40K → 25.2M
10:41/mi
3:41 split
Finish· 26.22 mi
4:10:56
Rank: #21847 (+75)
25.2M → Finish
9:17/mi
9:28 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:47
Pace8:45 /mi
2nd Half
Distance13.11 mi
Time2:16:09
Pace10:23 /mi
📊Positive Split: 18.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:0126:428:3626:42
8:36
-
10K
6.21 mi12:12:1052:518:3026:09
8:25
-0:11
15K
9.32 mi12:39:051:19:468:3326:55
8:40
+0:15
20K
12.43 mi13:07:441:48:258:4328:39
9:13
+0:33
Half
13.11 mi13:14:061:54:478:456:22
9:20
+0:07
25K
15.53 mi13:38:462:19:278:5924:40
10:10
+0:50
30K
18.64 mi14:13:002:53:419:1934:14
11:01
+0:51
20M
20.00 mi14:26:383:07:199:2213:38
10:02
-0:59
21M
21.00 mi14:37:253:18:069:2610:47
10:47
+0:45
35K
21.75 mi14:44:203:25:019:266:55
9:15
-1:32
23M
23.00 mi14:57:413:38:229:3013:21
10:40
+1:25
24M
24.00 mi15:08:003:48:419:3210:19
10:19
-0:21
40K
24.85 mi15:17:063:57:479:349:06
10:39
+0:20
25.2M
25.20 mi15:20:474:01:289:353:41
10:41
+0:02
Finish
26.22 mi15:30:154:10:569:359:28
9:17
-1:24

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

8:25 /mi

Average Pace

9:35 /mi

Slowest Pace

11:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:11:10

52% of race

Time at Steady Pace

48:37

19% of race

Time at Slower Pace

1:11:09

28% of race

Average Pace: 9:34 /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 mi11:46:0126:428:3626:42
8:36
#20434
10K
6.21 mi12:12:1052:518:3026:09
8:25
#19873
15K
9.32 mi12:39:051:19:468:3326:55
8:40
#20021
20K
12.43 mi13:07:441:48:258:4328:39
9:13
#20553
Half
13.11 mi13:14:061:54:478:456:22
9:20
#20704
25K
15.53 mi13:38:462:19:278:5924:40
10:10
#21460
30K
18.64 mi14:13:002:53:419:1934:14
11:01
#22223
20M
20.00 mi14:26:383:07:199:2213:38
10:02
#22139
21M
21.00 mi14:37:253:18:069:2610:47
10:47
#22028
35K
21.75 mi14:44:203:25:019:266:55
9:15
#21925
23M
23.00 mi14:57:413:38:229:3013:21
10:40
#21932
24M
24.00 mi15:08:003:48:419:3210:19
10:19
#21948
40K
24.85 mi15:17:063:57:479:349:06
10:39
#21953
25.2M
25.20 mi15:20:474:01:289:353:41
10:41
#21922
Finish
26.22 mi15:30:154:10:569:359:28
9:17
#21847
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi204347766776620282(Top 71%)7588(Top 62%)7588(Top 139%)
10K6.21 mi3.10 mi19873+5617398+3687398+36819313(Top 68%)7063(Top 58%)7063(Top 129%)
15K9.32 mi3.11 mi20021-1487477-797477-7920282(Top 71%)7588(Top 62%)7588(Top 139%)
20K12.43 mi3.11 mi20553-5327791-3147791-31421976(Top 77%)8569(Top 70%)8569(Top 157%)
Half13.11 mi0.68 mi20704-1517876-857876-8523077(Top 81%)9190(Top 75%)9190(Top 168%)
25K15.53 mi2.42 mi21460-7568299-4238299-42323671(Top 83%)9572(Top 78%)9572(Top 175%)
30K18.64 mi3.11 mi22223-7638747-4488747-44824033(Top 85%)9876(Top 81%)9876(Top 181%)
20M20.00 mi1.36 mi22139+848716+318716+3121081(Top 74%)8404(Top 69%)8404(Top 154%)
21M21.00 mi1.00 mi22028+1118680+368680+3620807(Top 73%)8352(Top 68%)8352(Top 153%)
35K21.75 mi0.75 mi21925+1038639+418639+4119398(Top 68%)7673(Top 63%)7673(Top 140%)
23M23.00 mi1.25 mi21932-78681-428681-4222435(Top 79%)9305(Top 76%)9305(Top 170%)
24M24.00 mi1.00 mi21948-168712-318712-3122302(Top 79%)9291(Top 76%)9291(Top 170%)
40K24.85 mi0.85 mi21953-58731-198731-1922311(Top 79%)9365(Top 77%)9365(Top 171%)
25.2M25.20 mi0.35 mi21922+318722+98722+919719(Top 69%)8030(Top 66%)8030(Top 147%)
Finish26.22 mi1.02 mi21847+758701+218701+2120366(Top 72%)8329(Top 68%)8329(Top 152%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21story building
+97ft-345ft

Overall

20282

Females

7588

F18-39

7588

5K→10K

3.1 - 6.2 mi

Top 68%
×5story building
+79ft-138ft

Overall

19313

Females

7063

F18-39

7063

10K→15K

6.2 - 9.3 mi

Top 71%
×3story building
+67ft-78ft

Overall

20282

Females

7588

F18-39

7588

15K→20K

9.3 - 12.4 mi

Top 77%
×5story building
+106ft-86ft

Overall

21976

Females

8569

F18-39

8569

20K→Half

12.4 - 13.1 mi

Top 81%
×2story building
+19ft-37ft

Overall

23077

Females

9190

F18-39

9190

Half→25K

13.1 - 15.5 mi

Top 83%
×4story building
+66ft-88ft

Overall

23671

Females

9572

F18-39

9572

25K→30K

15.5 - 18.6 mi

Top 85%
×9story building
+181ft-148ft

Overall

24033

Females

9876

F18-39

9876

30K→20M

18.6 - 20.0 mi

Top 74%
×5story building
+64ft-50ft

Overall

21081

Females

8404

F18-39

8404

20M→21M

20.0 - 21.0 mi

Top 73%
×8story building
+106ft-24ft

Overall

20807

Females

8352

F18-39

8352

21M→35K

21.0 - 21.8 mi

Top 68%
×7story building
+17ft-86ft

Overall

19398

Females

7673

F18-39

7673

35K→23M

21.8 - 23.0 mi

Top 79%
×5story building
+23ft-63ft

Overall

22435

Females

9305

F18-39

9305

23M→24M

23.0 - 24.0 mi

Top 79%
×6story building
+12ft-82ft

Overall

22302

Females

9291

F18-39

9291

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

22311

Females

9365

F18-39

9365

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

19719

Females

8030

F18-39

8030

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2story building
+22ft-21ft

Overall

20366

Females

8329

F18-39

8329

Passing Analysis

Category:
Athletes Passed
1632
Passed By
3045
Net Change
-1413
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20434
5K → 10K669108+561#20434#19873
10K → 15K138286-148#19873#20021
15K → 20K72604-532#20021#20553
20K → Half9160-151#20553#20704
Half → 25K27783-756#20704#21460
25K → 30K46809-763#21460#22223
30K → 20M12440+84#22223#22139
20M → 21M13524+111#22139#22028
21M → 35K1063+103#22028#21925
35K → 23M8390-7#21925#21932
23M → 24M4864-16#21932#21948
24M → 40K4146-5#21948#21953
40K → 25.2M4312+31#21953#21922
25.2M → Finish9116+75#21922#21847
TOTALS16323045-1413
📊

Passing Visuals

Category:
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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