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BOSTON MARATHON 2025

Anna Slagle

Bib: 15220•F

TN

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 50%
Masters (Masters Women)
#0 / 6759
Top 39%
Division (F40-44)
#0 / 1718
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:12/mi
25:29
↑ 97↓ 3451.5%
10K· 6.21 mi
8:15/mi
51:07
↑ 79↓ 1380.4%
15K· 9.32 mi
8:14/mi
1:16:43
↑ 67↓ 78
20K· 12.43 mi
8:30/mi
1:43:07
↑ 106↓ 860.1%
Half· 13.11 mi
8:21/mi
1:48:49
↑ 19↓ 370.5%
25K· 15.53 mi
8:37/mi
2:09:42
↑ 66↓ 880.2%
30K· 18.64 mi
9:11/mi
2:38:13
↑ 181↓ 1480.2%
20M
9:06/mi
2:50:35
↑ 64↓ 500.2%
21M
9:40/mi
3:00:15
↑ 106↓ 241.6%
35K· 21.75 mi
9:05/mi
3:07:03
↑ 17↓ 861.7%
23M
8:41/mi
3:17:55
↑ 23↓ 630.6%
24M
8:31/mi
3:26:26
↓ 821.3%
40K· 24.85 mi
8:35/mi
3:33:46
↓ 200.3%
25.2M
9:20/mi
3:36:59
↑ 13↓ 160.2%
Finish· 26.22 mi
7:52/mi
3:45:00
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:49
Pace8:18 /mi
2nd Half
Distance13.11 mi
Time1:56:11
Pace8:52 /mi
📊Positive Split: 6.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:3725:298:1225:29
8:12
-
10K
6.21 mi11:46:1551:078:1425:38
8:15
+0:03
15K
9.32 mi12:11:511:16:438:1425:36
8:14
-0:01
20K
12.43 mi12:38:151:43:078:1826:24
8:30
+0:16
Half
13.11 mi12:43:571:48:498:185:42
8:21
-0:09
25K
15.53 mi13:04:502:09:428:2120:53
8:37
+0:16
30K
18.64 mi13:33:212:38:138:2928:31
9:11
+0:34
20M
20.00 mi13:45:432:50:358:3212:22
9:06
-0:05
21M
21.00 mi13:55:233:00:158:359:40
9:40
+0:34
35K
21.75 mi14:02:113:07:038:366:48
9:05
-0:35
23M
23.00 mi14:13:033:17:558:3610:52
8:41
-0:24
24M
24.00 mi14:21:343:26:268:368:31
8:31
-0:10
40K
24.85 mi14:28:543:33:468:367:20
8:35
+0:04
25.2M
25.20 mi14:32:073:36:598:373:13
9:20
+0:45
Finish
26.22 mi14:40:083:45:008:358:01
7:52
-1:28

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

7:52 /mi

Average Pace

8:35 /mi

Slowest Pace

9:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:24:44

38% of race

Time at Steady Pace

1:19:42

35% of race

Time at Slower Pace

1:00:34

27% of race

Average Pace: 8:35 /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 mi11:20:3725:298:1225:29
8:12
#18126
10K
6.21 mi11:46:1551:078:1425:38
8:15
#18153
15K
9.32 mi12:11:511:16:438:1425:36
8:14
#17972
20K
12.43 mi12:38:151:43:078:1826:24
8:30
#17983
Half
13.11 mi12:43:571:48:498:185:42
8:21
#17987
25K
15.53 mi13:04:502:09:428:2120:53
8:37
#17924
30K
18.64 mi13:33:212:38:138:2928:31
9:11
#18021
20M
20.00 mi13:45:432:50:358:3212:22
9:06
#17957
21M
21.00 mi13:55:233:00:158:359:40
9:40
#17918
35K
21.75 mi14:02:113:07:038:366:48
9:05
#17936
23M
23.00 mi14:13:033:17:558:3610:52
8:41
#17706
24M
24.00 mi14:21:343:26:268:368:31
8:31
#17543
40K
24.85 mi14:28:543:33:468:367:20
8:35
#17412
25.2M
25.20 mi14:32:073:36:598:373:13
9:20
#17348
Finish
26.22 mi14:40:083:45:008:358:01
7:52
#17137
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi181266421642117666(Top 62%)6120(Top 50%)6120(Top 356%)
10K6.21 mi3.10 mi18153-276422-16422-118233(Top 64%)6443(Top 53%)6443(Top 375%)
15K9.32 mi3.11 mi17972+1816312+1106312+11017666(Top 62%)6120(Top 50%)6120(Top 356%)
20K12.43 mi3.11 mi17983-116326-146326-1418228(Top 64%)6463(Top 53%)6463(Top 376%)
Half13.11 mi0.68 mi17987-46328-26328-218330(Top 65%)6507(Top 53%)6507(Top 379%)
25K15.53 mi2.42 mi17924+636311+176311+1717881(Top 63%)6359(Top 52%)6359(Top 370%)
30K18.64 mi3.11 mi18021-976410-996410-9918546(Top 65%)6853(Top 56%)6853(Top 399%)
20M20.00 mi1.36 mi17957+646396+146396+1417325(Top 61%)6322(Top 52%)6322(Top 368%)
21M21.00 mi1.00 mi17918+396383+136383+1316889(Top 59%)6199(Top 51%)6199(Top 361%)
35K21.75 mi0.75 mi17936-186405-226405-2218674(Top 66%)7282(Top 60%)7282(Top 424%)
23M23.00 mi1.25 mi17706+2306333+726333+7214459(Top 51%)5048(Top 41%)5048(Top 294%)
24M24.00 mi1.00 mi17543+1636273+606273+6014658(Top 52%)5194(Top 42%)5194(Top 302%)
40K24.85 mi0.85 mi17412+1316223+506223+5013970(Top 49%)4956(Top 41%)4956(Top 288%)
25.2M25.20 mi0.35 mi17348+646196+276196+2713710(Top 48%)4890(Top 40%)4890(Top 285%)
Finish26.22 mi1.02 mi17137+2116093+1036093+10311990(Top 42%)3938(Top 32%)3938(Top 229%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 62%
×21story building
+97ft-345ft

Overall

17666

Females

6120

F40-44

6120

5K→10K

3.1 - 6.2 mi

Top 64%
×5story building
+79ft-138ft

Overall

18233

Females

6443

F40-44

6443

10K→15K

6.2 - 9.3 mi

Top 62%
×3story building
+67ft-78ft

Overall

17666

Females

6120

F40-44

6120

15K→20K

9.3 - 12.4 mi

Top 64%
×5story building
+106ft-86ft

Overall

18228

Females

6463

F40-44

6463

20K→Half

12.4 - 13.1 mi

Top 65%
×2story building
+19ft-37ft

Overall

18330

Females

6507

F40-44

6507

Half→25K

13.1 - 15.5 mi

Top 63%
×4story building
+66ft-88ft

Overall

17881

Females

6359

F40-44

6359

25K→30K

15.5 - 18.6 mi

Top 65%
×9story building
+181ft-148ft

Overall

18546

Females

6853

F40-44

6853

30K→20M

18.6 - 20.0 mi

Top 61%
×5story building
+64ft-50ft

Overall

17325

Females

6322

F40-44

6322

20M→21M

20.0 - 21.0 mi

Top 59%
×8story building
+106ft-24ft

Overall

16889

Females

6199

F40-44

6199

21M→35K

21.0 - 21.8 mi

Top 66%
×7story building
+17ft-86ft

Overall

18674

Females

7282

F40-44

7282

35K→23M

21.8 - 23.0 mi

Top 51%
×5story building
+23ft-63ft

Overall

14459

Females

5048

F40-44

5048

23M→24M

23.0 - 24.0 mi

Top 52%
×6story building
+12ft-82ft

Overall

14658

Females

5194

F40-44

5194

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

13970

Females

4956

F40-44

4956

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

13710

Females

4890

F40-44

4890

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2story building
+22ft-21ft

Overall

11990

Females

3938

F40-44

3938

Passing Analysis

Category:
Athletes Passed
2347
Passed By
1358
Net Change
+989
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18126
5K → 10K267294-27#18126#18153
10K → 15K282101+181#18153#17972
15K → 20K191202-11#17972#17983
20K → Half3640-4#17983#17987
Half → 25K194131+63#17987#17924
25K → 30K206303-97#17924#18021
30K → 20M14985+64#18021#17957
20M → 21M12081+39#17957#17918
21M → 35K5674-18#17918#17936
35K → 23M24818+230#17936#17706
23M → 24M17310+163#17706#17543
24M → 40K14211+131#17543#17412
40K → 25.2M695+64#17412#17348
25.2M → Finish2143+211#17348#17137
TOTALS23471358+989
📊

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