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BOSTON MARATHON 2025

Zhonglan Shen

Bib: 18734•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 46%
Gender (Female)
#0 / 12228
Top 31%
Masters (Masters Women)
#0 / 6759
Top 16%
Division (F55-59)
#0 / 994
Top 5%
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
24:38
↑ 97↓ 3451.5%
10K· 6.21 mi
7:39/mi
48:25
↑ 79↓ 1380.4%
15K· 9.32 mi
7:39/mi
1:12:10
↑ 67↓ 78
20K· 12.43 mi
7:46/mi
1:36:17
↑ 106↓ 860.1%
Half· 13.11 mi
7:33/mi
1:41:26
↑ 19↓ 370.5%
25K· 15.53 mi
7:54/mi
2:00:35
↑ 66↓ 880.2%
30K· 18.64 mi
8:03/mi
2:25:36
↑ 181↓ 1480.2%
20M
8:17/mi
2:36:52
↑ 64↓ 500.2%
21M
9:21/mi
2:46:13
↑ 106↓ 241.6%
35K· 21.75 mi
8:09/mi
2:52:19
↑ 17↓ 861.7%
23M
8:25/mi
3:02:51
↑ 23↓ 630.6%
24M
8:00/mi
3:10:51
↓ 821.3%
40K· 24.85 mi
8:09/mi
3:17:49
↓ 200.3%
25.2M
9:14/mi
3:21:00
↑ 13↓ 160.2%
Finish· 26.22 mi
8:06/mi
3:29:15
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:26
Pace7:44 /mi
2nd Half
Distance13.11 mi
Time1:47:49
Pace8:13 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:3924:387:5624:38
7:56
-
10K
6.21 mi11:39:2648:257:4823:47
7:39
-0:17
15K
9.32 mi12:03:111:12:107:4523:45
7:39
0:00
20K
12.43 mi12:27:181:36:177:4524:07
7:46
+0:07
Half
13.11 mi12:32:271:41:267:445:09
7:33
-0:13
25K
15.53 mi12:51:362:00:357:4619:09
7:54
+0:21
30K
18.64 mi13:16:372:25:367:4925:01
8:03
+0:09
20M
20.00 mi13:27:532:36:527:5111:16
8:17
+0:14
21M
21.00 mi13:37:142:46:137:559:21
9:21
+1:04
35K
21.75 mi13:43:202:52:197:556:06
8:09
-1:12
23M
23.00 mi13:53:523:02:517:5710:32
8:25
+0:16
24M
24.00 mi14:01:523:10:517:578:00
8:00
-0:25
40K
24.85 mi14:08:503:17:497:586:58
8:09
+0:09
25.2M
25.20 mi14:12:013:21:007:593:11
9:14
+1:05
Finish
26.22 mi14:20:163:29:157:598:15
8:06
-1:08

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

7:33 /mi

Average Pace

7:59 /mi

Slowest Pace

9:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:16:48

37% of race

Time at Steady Pace

1:49:23

52% of race

Time at Slower Pace

23:04

11% of race

Average Pace: 7:59 /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 mi11:15:3924:387:5624:38
7:56
#15998
10K
6.21 mi11:39:2648:257:4823:47
7:39
#14717
15K
9.32 mi12:03:111:12:107:4523:45
7:39
#14132
20K
12.43 mi12:27:181:36:177:4524:07
7:46
#13784
Half
13.11 mi12:32:271:41:267:445:09
7:33
#13697
25K
15.53 mi12:51:362:00:357:4619:09
7:54
#13553
30K
18.64 mi13:16:372:25:367:4925:01
8:03
#13182
20M
20.00 mi13:27:532:36:527:5111:16
8:17
#13074
21M
21.00 mi13:37:142:46:137:559:21
9:21
#13209
35K
21.75 mi13:43:202:52:197:556:06
8:09
#13198
23M
23.00 mi13:53:523:02:517:5710:32
8:25
#13158
24M
24.00 mi14:01:523:10:517:578:00
8:00
#13049
40K
24.85 mi14:08:503:17:497:586:58
8:09
#12958
25.2M
25.20 mi14:12:013:21:007:593:11
9:14
#12975
Finish
26.22 mi14:20:163:29:157:598:15
8:06
#12993
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi159985146514613006(Top 46%)3448(Top 28%)3448(Top 347%)
10K6.21 mi3.10 mi14717+12814374+7724374+77213512(Top 48%)3671(Top 30%)3671(Top 369%)
15K9.32 mi3.11 mi14132+5854047+3274047+32713006(Top 46%)3448(Top 28%)3448(Top 347%)
20K12.43 mi3.11 mi13784+3483888+1593888+15912981(Top 46%)3540(Top 29%)3540(Top 356%)
Half13.11 mi0.68 mi13697+873850+383850+3812223(Top 43%)3084(Top 25%)3084(Top 310%)
25K15.53 mi2.42 mi13553+1443795+553795+5513092(Top 46%)3721(Top 30%)3721(Top 374%)
30K18.64 mi3.11 mi13182+3713657+1383657+13811781(Top 41%)3183(Top 26%)3183(Top 320%)
20M20.00 mi1.36 mi13074+1083622+353622+3512444(Top 44%)3663(Top 30%)3663(Top 369%)
21M21.00 mi1.00 mi13209-1353729-1073729-10715407(Top 54%)5390(Top 44%)5390(Top 542%)
35K21.75 mi0.75 mi13198+113737-83737-813317(Top 47%)4316(Top 35%)4316(Top 434%)
23M23.00 mi1.25 mi13158+403763-263763-2612789(Top 45%)4155(Top 34%)4155(Top 418%)
24M24.00 mi1.00 mi13049+1093732+313732+3111272(Top 40%)3452(Top 28%)3452(Top 347%)
40K24.85 mi0.85 mi12958+913709+233709+2311256(Top 40%)3540(Top 29%)3540(Top 356%)
25.2M25.20 mi0.35 mi12975-173727-183727-1813132(Top 46%)4551(Top 37%)4551(Top 458%)
Finish26.22 mi1.02 mi12993-183753-263753-2613571(Top 48%)4729(Top 39%)4729(Top 476%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 46%
×21story building
+97ft-345ft

Overall

13006

Females

3448

F55-59

3448

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

13512

Females

3671

F55-59

3671

10K→15K

6.2 - 9.3 mi

Top 46%
×3story building
+67ft-78ft

Overall

13006

Females

3448

F55-59

3448

15K→20K

9.3 - 12.4 mi

Top 46%
×5story building
+106ft-86ft

Overall

12981

Females

3540

F55-59

3540

20K→Half

12.4 - 13.1 mi

Top 43%
×2story building
+19ft-37ft

Overall

12223

Females

3084

F55-59

3084

Half→25K

13.1 - 15.5 mi

Top 46%
×4story building
+66ft-88ft

Overall

13092

Females

3721

F55-59

3721

25K→30K

15.5 - 18.6 mi

Top 41%
×9story building
+181ft-148ft

Overall

11781

Females

3183

F55-59

3183

30K→20M

18.6 - 20.0 mi

Top 44%
×5story building
+64ft-50ft

Overall

12444

Females

3663

F55-59

3663

20M→21M

20.0 - 21.0 mi

Top 54%
×8story building
+106ft-24ft

Overall

15407

Females

5390

F55-59

5390

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

13317

Females

4316

F55-59

4316

35K→23M

21.8 - 23.0 mi

Top 45%
×5story building
+23ft-63ft

Overall

12789

Females

4155

F55-59

4155

23M→24M

23.0 - 24.0 mi

Top 40%
×6story building
+12ft-82ft

Overall

11272

Females

3452

F55-59

3452

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

11256

Females

3540

F55-59

3540

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

13132

Females

4551

F55-59

4551

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2story building
+22ft-21ft

Overall

13571

Females

4729

F55-59

4729

Passing Analysis

Category:
Athletes Passed
3857
Passed By
852
Net Change
+3005
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15998
5K → 10K131534+1281#15998#14717
10K → 15K60924+585#14717#14132
15K → 20K40254+348#14132#13784
20K → Half914+87#13784#13697
Half → 25K244100+144#13697#13553
25K → 30K44069+371#13553#13182
30K → 20M16052+108#13182#13074
20M → 21M60195-135#13074#13209
21M → 35K6352+11#13209#13198
35K → 23M13393+40#13198#13158
23M → 24M13021+109#13158#13049
24M → 40K11827+91#13049#12958
40K → 25.2M2744-17#12958#12975
25.2M → Finish6583-18#12975#12993
TOTALS3857852+3005
📊

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