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BOSTON MARATHON 2025

Susan Reimer

Bib: 21428•F

AB

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 39%
Masters (Masters Women)
#0 / 6759
Top 25%
Division (F50-54)
#0 / 1303
Top 16%
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
7:56/mi
24:40
↑ 97↓ 3451.5%
10K· 6.21 mi
7:56/mi
49:19
↑ 79↓ 1380.4%
15K· 9.32 mi
8:34/mi
1:15:55
↑ 67↓ 78
20K· 12.43 mi
8:03/mi
1:40:56
↑ 106↓ 860.1%
Half· 13.11 mi
7:50/mi
1:46:17
↑ 19↓ 370.5%
25K· 15.53 mi
8:48/mi
2:07:36
↑ 66↓ 880.2%
30K· 18.64 mi
8:16/mi
2:33:16
↑ 181↓ 1480.2%
20M
8:16/mi
2:44:30
↑ 64↓ 500.2%
21M
9:04/mi
2:53:34
↑ 106↓ 241.6%
35K· 21.75 mi
7:51/mi
2:59:26
↑ 17↓ 861.7%
23M
8:14/mi
3:09:44
↑ 23↓ 630.6%
24M
7:59/mi
3:17:43
↓ 821.3%
40K· 24.85 mi
8:19/mi
3:24:50
↓ 200.3%
25.2M
9:17/mi
3:28:02
↑ 13↓ 160.2%
Finish· 26.22 mi
8:04/mi
3:36:15
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:17
Pace8:06 /mi
2nd Half
Distance13.11 mi
Time1:49:58
Pace8:23 /mi
📊Positive Split: 3.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:2524:407:5624:40
7:56
-
10K
6.21 mi11:46:0449:197:5624:39
7:56
0:00
15K
9.32 mi12:12:401:15:558:0926:36
8:34
+0:38
20K
12.43 mi12:37:411:40:568:0725:01
8:03
-0:31
Half
13.11 mi12:43:021:46:178:065:21
7:50
-0:13
25K
15.53 mi13:04:212:07:368:1321:19
8:48
+0:58
30K
18.64 mi13:30:012:33:168:1325:40
8:16
-0:32
20M
20.00 mi13:41:152:44:308:1311:14
8:16
0:00
21M
21.00 mi13:50:192:53:348:169:04
9:04
+0:48
35K
21.75 mi13:56:112:59:268:155:52
7:51
-1:13
23M
23.00 mi14:06:293:09:448:1510:18
8:14
+0:23
24M
24.00 mi14:14:283:17:438:147:59
7:59
-0:15
40K
24.85 mi14:21:353:24:508:147:07
8:19
+0:20
25.2M
25.20 mi14:24:473:28:028:153:12
9:17
+0:58
Finish
26.22 mi14:33:003:36:158:158:13
8:04
-1:13

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

7:50 /mi

Average Pace

8:15 /mi

Slowest Pace

9:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:02:40

84% of race

Time at Steady Pace

30:23

14% of race

Time at Slower Pace

3:12

1% of race

Average Pace: 8:15 /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 mi11:21:2524:407:5624:40
7:56
#16110
10K
6.21 mi11:46:0449:197:5624:39
7:56
#15988
15K
9.32 mi12:12:401:15:558:0926:36
8:34
#17397
20K
12.43 mi12:37:411:40:568:0725:01
8:03
#16847
Half
13.11 mi12:43:021:46:178:065:21
7:50
#16721
25K
15.53 mi13:04:212:07:368:1321:19
8:48
#17041
30K
18.64 mi13:30:012:33:168:1325:40
8:16
#16359
20M
20.00 mi13:41:152:44:308:1311:14
8:16
#16044
21M
21.00 mi13:50:192:53:348:169:04
9:04
#15849
35K
21.75 mi13:56:112:59:268:155:52
7:51
#15656
23M
23.00 mi14:06:293:09:448:1510:18
8:14
#15375
24M
24.00 mi14:14:283:17:438:147:59
7:59
#15169
40K
24.85 mi14:21:353:24:508:147:07
8:19
#15048
25.2M
25.20 mi14:24:473:28:028:153:12
9:17
#14992
Finish
26.22 mi14:33:003:36:158:158:13
8:04
#14901
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi161105212521219702(Top 69%)7272(Top 59%)7272(Top 558%)
10K6.21 mi3.10 mi15988+1225127+855127+8515956(Top 56%)5098(Top 42%)5098(Top 391%)
15K9.32 mi3.11 mi17397-14095949-8225949-82219702(Top 69%)7272(Top 59%)7272(Top 558%)
20K12.43 mi3.11 mi16847+5505647+3025647+30215308(Top 54%)4806(Top 39%)4806(Top 369%)
Half13.11 mi0.68 mi16721+1265573+745573+7414685(Top 52%)4452(Top 36%)4452(Top 342%)
25K15.53 mi2.42 mi17041-3205791-2185791-21818889(Top 67%)6911(Top 57%)6911(Top 530%)
30K18.64 mi3.11 mi16359+6825446+3455446+34513260(Top 47%)3981(Top 33%)3981(Top 306%)
20M20.00 mi1.36 mi16044+3155291+1555291+15512310(Top 43%)3610(Top 30%)3610(Top 277%)
21M21.00 mi1.00 mi15849+1955216+755216+7513930(Top 49%)4599(Top 38%)4599(Top 353%)
35K21.75 mi0.75 mi15656+1935126+905126+9011209(Top 39%)3235(Top 26%)3235(Top 248%)
23M23.00 mi1.25 mi15375+2814998+1284998+12811580(Top 41%)3535(Top 29%)3535(Top 271%)
24M24.00 mi1.00 mi15169+2064902+964902+9611182(Top 39%)3414(Top 28%)3414(Top 262%)
40K24.85 mi0.85 mi15048+1214866+364866+3612340(Top 43%)4109(Top 34%)4109(Top 315%)
25.2M25.20 mi0.35 mi14992+564846+204846+2013412(Top 47%)4721(Top 39%)4721(Top 362%)
Finish26.22 mi1.02 mi14901+914818+284818+2813351(Top 47%)4630(Top 38%)4630(Top 355%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21story building
+97ft-345ft

Overall

19702

Females

7272

F50-54

7272

5K→10K

3.1 - 6.2 mi

Top 56%
×5story building
+79ft-138ft

Overall

15956

Females

5098

F50-54

5098

10K→15K

6.2 - 9.3 mi

Top 69%
×3story building
+67ft-78ft

Overall

19702

Females

7272

F50-54

7272

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

15308

Females

4806

F50-54

4806

20K→Half

12.4 - 13.1 mi

Top 52%
×2story building
+19ft-37ft

Overall

14685

Females

4452

F50-54

4452

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

18889

Females

6911

F50-54

6911

25K→30K

15.5 - 18.6 mi

Top 47%
×9story building
+181ft-148ft

Overall

13260

Females

3981

F50-54

3981

30K→20M

18.6 - 20.0 mi

Top 43%
×5story building
+64ft-50ft

Overall

12310

Females

3610

F50-54

3610

20M→21M

20.0 - 21.0 mi

Top 49%
×8story building
+106ft-24ft

Overall

13930

Females

4599

F50-54

4599

21M→35K

21.0 - 21.8 mi

Top 39%
×7story building
+17ft-86ft

Overall

11209

Females

3235

F50-54

3235

35K→23M

21.8 - 23.0 mi

Top 41%
×5story building
+23ft-63ft

Overall

11580

Females

3535

F50-54

3535

23M→24M

23.0 - 24.0 mi

Top 39%
×6story building
+12ft-82ft

Overall

11182

Females

3414

F50-54

3414

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

12340

Females

4109

F50-54

4109

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

13412

Females

4721

F50-54

4721

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2story building
+22ft-21ft

Overall

13351

Females

4630

F50-54

4630

Passing Analysis

Category:
Athletes Passed
3414
Passed By
2205
Net Change
+1209
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16110
5K → 10K380258+122#16110#15988
10K → 15K261435-1409#15988#17397
15K → 20K5599+550#17397#16847
20K → Half1315+126#16847#16721
Half → 25K73393-320#16721#17041
25K → 30K6919+682#17041#16359
30K → 20M3205+315#16359#16044
20M → 21M21924+195#16044#15849
21M → 35K1974+193#15849#15656
35K → 23M2843+281#15656#15375
23M → 24M2126+206#15375#15169
24M → 40K13413+121#15169#15048
40K → 25.2M6913+56#15048#14992
25.2M → Finish11928+91#14992#14901
TOTALS34142205+1209
📊

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