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BOSTON MARATHON 2025

Susan Pierce

Bib: 25881•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
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
9:54/mi
30:47
↑ 97↓ 3451.5%
10K· 6.21 mi
10:28/mi
1:03:19
↑ 79↓ 1380.4%
15K· 9.32 mi
10:51/mi
1:37:01
↑ 67↓ 78
20K· 12.43 mi
13:49/mi
2:19:56
↑ 106↓ 860.1%
Half· 13.11 mi
11:30/mi
2:27:47
↑ 19↓ 370.5%
25K· 15.53 mi
13:58/mi
3:01:39
↑ 66↓ 880.2%
30K· 18.64 mi
14:21/mi
3:46:14
↑ 181↓ 1480.2%
20M
18:38/mi
4:11:33
↑ 64↓ 500.2%
21M
16:00/mi
4:27:33
↑ 106↓ 241.6%
35K· 21.75 mi
12:31/mi
4:36:55
↑ 17↓ 861.7%
23M
13:29/mi
4:53:48
↑ 23↓ 630.6%
24M
12:39/mi
5:06:27
↓ 821.3%
40K· 24.85 mi
16:25/mi
5:20:29
↓ 200.3%
25.2M
13:55/mi
5:25:17
↑ 13↓ 160.2%
Finish· 26.22 mi
11:39/mi
5:37:09
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:27:47
Pace11:16 /mi
2nd Half
Distance13.11 mi
Time3:09:22
Pace14:27 /mi
📊Positive Split: 28.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:5730:479:5430:47
9:54
-
10K
6.21 mi12:18:291:03:1910:1132:32
10:28
+0:34
15K
9.32 mi12:52:111:37:0110:2533:42
10:51
+0:23
20K
12.43 mi13:35:062:19:5611:1642:55
13:49
+2:58
Half
13.11 mi13:42:572:27:4711:167:51
11:30
-2:19
25K
15.53 mi14:16:493:01:3911:4233:52
13:58
+2:28
30K
18.64 mi15:01:243:46:1412:0844:35
14:21
+0:23
20M
20.00 mi15:26:434:11:3312:3525:19
18:38
+4:17
21M
21.00 mi15:42:434:27:3312:4416:00
16:00
-2:38
35K
21.75 mi15:52:054:36:5512:449:22
12:31
-3:29
23M
23.00 mi16:08:584:53:4812:4616:53
13:29
+0:58
24M
24.00 mi16:21:375:06:2712:4612:39
12:39
-0:50
40K
24.85 mi16:35:395:20:2912:5414:02
16:25
+3:46
25.2M
25.20 mi16:40:275:25:1712:544:48
13:55
-2:30
Finish
26.22 mi16:52:195:37:0912:5211:52
11:39
-2:16

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

9:54 /mi

Average Pace

12:52 /mi

Slowest Pace

18:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:56:44

35% of race

Time at Steady Pace

2:45:04

49% of race

Time at Slower Pace

55:21

16% of race

Average Pace: 12:52 /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 mi11:45:5730:479:5430:47
9:54
#25367
10K
6.21 mi12:18:291:03:1910:1132:32
10:28
#25890
15K
9.32 mi12:52:111:37:0110:2533:42
10:51
#26093
20K
12.43 mi13:35:062:19:5611:1642:55
13:49
#27108
Half
13.11 mi13:42:572:27:4711:167:51
11:30
#27101
25K
15.53 mi14:16:493:01:3911:4233:52
13:58
#27311
30K
18.64 mi15:01:243:46:1412:0844:35
14:21
#27433
20M
20.00 mi15:26:434:11:3312:3525:19
18:38
#27677
21M
21.00 mi15:42:434:27:3312:4416:00
16:00
#27706
35K
21.75 mi15:52:054:36:5512:449:22
12:31
#27676
23M
23.00 mi16:08:584:53:4812:4616:53
13:29
#27639
24M
24.00 mi16:21:375:06:2712:4612:39
12:39
#27621
40K
24.85 mi16:35:395:20:2912:5414:02
16:25
#27689
25.2M
25.20 mi16:40:275:25:1712:544:48
13:55
#27674
Finish
26.22 mi16:52:195:37:0912:5211:52
11:39
#27640
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi25367104101041026477(Top 93%)11052(Top 90%)11052(Top 848%)
10K6.21 mi3.10 mi25890-52310709-29910709-29926216(Top 92%)10913(Top 89%)10913(Top 838%)
15K9.32 mi3.11 mi26093-20310833-12410833-12426477(Top 93%)11052(Top 90%)11052(Top 848%)
20K12.43 mi3.11 mi27108-101511434-60111434-60128182(Top 99%)12110(Top 99%)12110(Top 929%)
Half13.11 mi0.68 mi27101+711428+611428+627057(Top 95%)11457(Top 94%)11457(Top 879%)
25K15.53 mi2.42 mi27311-21011563-13511563-13527868(Top 98%)11933(Top 98%)11933(Top 916%)
30K18.64 mi3.11 mi27433-12211659-9611659-9627734(Top 98%)11910(Top 97%)11910(Top 914%)
20M20.00 mi1.36 mi27677-24411811-15211811-15228362(Top 100%)12217(Top 100%)12217(Top 938%)
21M21.00 mi1.00 mi27706-2911829-1811829-1827802(Top 98%)11957(Top 98%)11957(Top 918%)
35K21.75 mi0.75 mi27676+3011817+1211817+1226478(Top 93%)11325(Top 93%)11325(Top 869%)
23M23.00 mi1.25 mi27639+3711803+1411803+1426867(Top 95%)11536(Top 94%)11536(Top 885%)
24M24.00 mi1.00 mi27621+1811798+511798+526481(Top 93%)11364(Top 93%)11364(Top 872%)
40K24.85 mi0.85 mi27689-6811843-4511843-4528182(Top 99%)12161(Top 99%)12161(Top 933%)
25.2M25.20 mi0.35 mi27674+1511838+511838+526195(Top 92%)11291(Top 92%)11291(Top 867%)
Finish26.22 mi1.02 mi27640+3411825+1311825+1326344(Top 93%)11320(Top 93%)11320(Top 869%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 93%
×21story building
+97ft-345ft

Overall

26477

Females

11052

F50-54

11052

5K→10K

3.1 - 6.2 mi

Top 92%
×5story building
+79ft-138ft

Overall

26216

Females

10913

F50-54

10913

10K→15K

6.2 - 9.3 mi

Top 93%
×3story building
+67ft-78ft

Overall

26477

Females

11052

F50-54

11052

15K→20K

9.3 - 12.4 mi

Top 99%
×5story building
+106ft-86ft

Overall

28182

Females

12110

F50-54

12110

20K→Half

12.4 - 13.1 mi

Top 95%
×2story building
+19ft-37ft

Overall

27057

Females

11457

F50-54

11457

Half→25K

13.1 - 15.5 mi

Top 98%
×4story building
+66ft-88ft

Overall

27868

Females

11933

F50-54

11933

25K→30K

15.5 - 18.6 mi

Top 98%
×9story building
+181ft-148ft

Overall

27734

Females

11910

F50-54

11910

30K→20M

18.6 - 20.0 mi

Top 100%
×5story building
+64ft-50ft

Overall

28362

Females

12217

F50-54

12217

20M→21M

20.0 - 21.0 mi

Top 98%
×8story building
+106ft-24ft

Overall

27802

Females

11957

F50-54

11957

21M→35K

21.0 - 21.8 mi

Top 93%
×7story building
+17ft-86ft

Overall

26478

Females

11325

F50-54

11325

35K→23M

21.8 - 23.0 mi

Top 95%
×5story building
+23ft-63ft

Overall

26867

Females

11536

F50-54

11536

23M→24M

23.0 - 24.0 mi

Top 93%
×6story building
+12ft-82ft

Overall

26481

Females

11364

F50-54

11364

24M→40K

24.0 - 24.9 mi

Top 99%
×1story
+6ft-20ft

Overall

28182

Females

12161

F50-54

12161

40K→25.2M

24.9 - 25.2 mi

Top 92%
×1story
+13ft-16ft

Overall

26195

Females

11291

F50-54

11291

25.2M→Finish

25.2 - 26.2 mi

Top 93%
×2story building
+22ft-21ft

Overall

26344

Females

11320

F50-54

11320

Passing Analysis

Category:
Athletes Passed
385
Passed By
2658
Net Change
-2273
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25367
5K → 10K56579-523#25367#25890
10K → 15K64267-203#25890#26093
15K → 20K41019-1015#26093#27108
20K → Half1912+7#27108#27101
Half → 25K28238-210#27101#27311
25K → 30K41163-122#27311#27433
30K → 20M3247-244#27433#27677
20M → 21M1443-29#27677#27706
21M → 35K300+30#27706#27676
35K → 23M436+37#27676#27639
23M → 24M279+18#27639#27621
24M → 40K472-68#27621#27689
40K → 25.2M161+15#27689#27674
25.2M → Finish362+34#27674#27640
TOTALS3852658-2273
📊

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