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BOSTON MARATHON 2025

Yun Tu

Bib: 18738•F

BC

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 41%
Gender (Female)
#0 / 12228
Top 25%
Division (F18-39)
#0 / 5469
Top 42%
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
7:41/mi
23:53
↑ 97↓ 3451.5%
10K· 6.21 mi
7:32/mi
47:17
↑ 79↓ 1380.4%
15K· 9.32 mi
7:35/mi
1:10:52
↑ 67↓ 78
20K· 12.43 mi
7:38/mi
1:34:35
↑ 106↓ 860.1%
Half· 13.11 mi
7:29/mi
1:39:41
↑ 19↓ 370.5%
25K· 15.53 mi
7:41/mi
1:58:18
↑ 66↓ 880.2%
30K· 18.64 mi
7:55/mi
2:22:55
↑ 181↓ 1480.2%
20M
7:58/mi
2:33:45
↑ 64↓ 500.2%
21M
8:39/mi
2:42:24
↑ 106↓ 241.6%
35K· 21.75 mi
7:44/mi
2:48:11
↑ 17↓ 861.7%
23M
8:17/mi
2:58:33
↑ 23↓ 630.6%
24M
8:03/mi
3:06:36
↓ 821.3%
40K· 24.85 mi
8:14/mi
3:13:38
↓ 200.3%
25.2M
9:02/mi
3:16:45
↑ 13↓ 160.2%
Finish· 26.22 mi
8:00/mi
3:24:54
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:41
Pace7:36 /mi
2nd Half
Distance13.11 mi
Time1:45:13
Pace8:02 /mi
📊Positive Split: 5.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:1823:537:4123:53
7:41
-
10K
6.21 mi11:38:4247:177:3723:24
7:32
-0:09
15K
9.32 mi12:02:171:10:527:3623:35
7:35
+0:03
20K
12.43 mi12:26:001:34:357:3723:43
7:38
+0:03
Half
13.11 mi12:31:061:39:417:365:06
7:29
-0:09
25K
15.53 mi12:49:431:58:187:3718:37
7:41
+0:12
30K
18.64 mi13:14:202:22:557:4024:37
7:55
+0:14
20M
20.00 mi13:25:102:33:457:4110:50
7:58
+0:03
21M
21.00 mi13:33:492:42:247:448:39
8:39
+0:41
35K
21.75 mi13:39:362:48:117:445:47
7:44
-0:55
23M
23.00 mi13:49:582:58:337:4610:22
8:17
+0:33
24M
24.00 mi13:58:013:06:367:478:03
8:03
-0:14
40K
24.85 mi14:05:033:13:387:477:02
8:14
+0:11
25.2M
25.20 mi14:08:103:16:457:483:07
9:02
+0:48
Finish
26.22 mi14:16:193:24:547:498:09
8:00
-1:02

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

7:29 /mi

Average Pace

7:49 /mi

Slowest Pace

9:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:58:18

58% of race

Time at Steady Pace

57:26

28% of race

Time at Slower Pace

29:10

14% of race

Average Pace: 7:49 /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 mi11:15:1823:537:4123:53
7:41
#13876
10K
6.21 mi11:38:4247:177:3723:24
7:32
#13126
15K
9.32 mi12:02:171:10:527:3623:35
7:35
#12900
20K
12.43 mi12:26:001:34:357:3723:43
7:38
#12585
Half
13.11 mi12:31:061:39:417:365:06
7:29
#12532
25K
15.53 mi12:49:431:58:187:3718:37
7:41
#12330
30K
18.64 mi13:14:202:22:557:4024:37
7:55
#11970
20M
20.00 mi13:25:102:33:457:4110:50
7:58
#11794
21M
21.00 mi13:33:492:42:247:448:39
8:39
#11756
35K
21.75 mi13:39:362:48:117:445:47
7:44
#11691
23M
23.00 mi13:49:582:58:337:4610:22
8:17
#11674
24M
24.00 mi13:58:013:06:367:478:03
8:03
#11630
40K
24.85 mi14:05:033:13:387:477:02
8:14
#11610
25.2M
25.20 mi14:08:103:16:457:483:07
9:02
#11608
Finish
26.22 mi14:16:193:24:547:498:09
8:00
#11652
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi138763822382212535(Top 44%)3182(Top 26%)3182(Top 58%)
10K6.21 mi3.10 mi13126+7503415+4073415+40712406(Top 44%)3039(Top 25%)3039(Top 56%)
15K9.32 mi3.11 mi12900+2263329+863329+8612535(Top 44%)3182(Top 26%)3182(Top 58%)
20K12.43 mi3.11 mi12585+3153194+1353194+13511839(Top 42%)2912(Top 24%)2912(Top 53%)
Half13.11 mi0.68 mi12532+533165+293165+2911569(Top 41%)2728(Top 22%)2728(Top 50%)
25K15.53 mi2.42 mi12330+2023093+723093+7211396(Top 40%)2800(Top 23%)2800(Top 51%)
30K18.64 mi3.11 mi11970+3602980+1132980+11310835(Top 38%)2708(Top 22%)2708(Top 50%)
20M20.00 mi1.36 mi11794+1762920+602920+6010291(Top 36%)2592(Top 21%)2592(Top 47%)
21M21.00 mi1.00 mi11756+382937-172937-1711394(Top 40%)3295(Top 27%)3295(Top 60%)
35K21.75 mi0.75 mi11691+652930+72930+710357(Top 36%)2782(Top 23%)2782(Top 51%)
23M23.00 mi1.25 mi11674+172967-372967-3711930(Top 42%)3697(Top 30%)3697(Top 68%)
24M24.00 mi1.00 mi11630+442990-232990-2311605(Top 41%)3620(Top 30%)3620(Top 66%)
40K24.85 mi0.85 mi11610+203005-153005-1511732(Top 41%)3767(Top 31%)3767(Top 69%)
25.2M25.20 mi0.35 mi11608+23014-93014-912046(Top 42%)3987(Top 33%)3987(Top 73%)
Finish26.22 mi1.02 mi11652-443084-703084-7012876(Top 45%)4359(Top 36%)4359(Top 80%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 44%
×21story building
+97ft-345ft

Overall

12535

Females

3182

F18-39

3182

5K→10K

3.1 - 6.2 mi

Top 44%
×5story building
+79ft-138ft

Overall

12406

Females

3039

F18-39

3039

10K→15K

6.2 - 9.3 mi

Top 44%
×3story building
+67ft-78ft

Overall

12535

Females

3182

F18-39

3182

15K→20K

9.3 - 12.4 mi

Top 42%
×5story building
+106ft-86ft

Overall

11839

Females

2912

F18-39

2912

20K→Half

12.4 - 13.1 mi

Top 41%
×2story building
+19ft-37ft

Overall

11569

Females

2728

F18-39

2728

Half→25K

13.1 - 15.5 mi

Top 40%
×4story building
+66ft-88ft

Overall

11396

Females

2800

F18-39

2800

25K→30K

15.5 - 18.6 mi

Top 38%
×9story building
+181ft-148ft

Overall

10835

Females

2708

F18-39

2708

30K→20M

18.6 - 20.0 mi

Top 36%
×5story building
+64ft-50ft

Overall

10291

Females

2592

F18-39

2592

20M→21M

20.0 - 21.0 mi

Top 40%
×8story building
+106ft-24ft

Overall

11394

Females

3295

F18-39

3295

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

10357

Females

2782

F18-39

2782

35K→23M

21.8 - 23.0 mi

Top 42%
×5story building
+23ft-63ft

Overall

11930

Females

3697

F18-39

3697

23M→24M

23.0 - 24.0 mi

Top 41%
×6story building
+12ft-82ft

Overall

11605

Females

3620

F18-39

3620

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

11732

Females

3767

F18-39

3767

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

12046

Females

3987

F18-39

3987

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2story building
+22ft-21ft

Overall

12876

Females

4359

F18-39

4359

Passing Analysis

Category:
Athletes Passed
3111
Passed By
887
Net Change
+2224
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13876
5K → 10K80050+750#13876#13126
10K → 15K337111+226#13126#12900
15K → 20K37358+315#12900#12585
20K → Half607+53#12585#12532
Half → 25K26058+202#12532#12330
25K → 30K43272+360#12330#11970
30K → 20M20832+176#11970#11794
20M → 21M12385+38#11794#11756
21M → 35K9328+65#11756#11691
35K → 23M118101+17#11691#11674
23M → 24M10864+44#11674#11630
24M → 40K8565+20#11630#11610
40K → 25.2M3735+2#11610#11608
25.2M → Finish77121-44#11608#11652
TOTALS3111887+2224
📊

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