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BOSTON MARATHON 2025

Kun Xie

Bib: 12989•M

QC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
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
8:20/mi
25:52
↑ 97↓ 3451.5%
10K· 6.21 mi
8:10/mi
51:13
↑ 79↓ 1380.4%
15K· 9.32 mi
8:28/mi
1:17:31
↑ 67↓ 78
20K· 12.43 mi
8:36/mi
1:44:14
↑ 106↓ 860.1%
Half· 13.11 mi
8:24/mi
1:49:58
↑ 19↓ 370.5%
25K· 15.53 mi
8:30/mi
2:10:34
↑ 66↓ 880.2%
30K· 18.64 mi
9:10/mi
2:39:03
↑ 181↓ 1480.2%
20M
9:21/mi
2:51:46
↑ 64↓ 500.2%
21M
10:32/mi
3:02:18
↑ 106↓ 241.6%
35K· 21.75 mi
10:30/mi
3:10:09
↑ 17↓ 861.7%
23M
37:31/mi
3:57:07
↑ 23↓ 630.6%
24M
16:17/mi
4:13:24
↓ 821.3%
40K· 24.85 mi
15:34/mi
4:26:43
↓ 200.3%
25.2M
12:31/mi
4:31:02
↑ 13↓ 160.2%
Finish· 26.22 mi
10:10/mi
4:41:24
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:58
Pace8:23 /mi
2nd Half
Distance13.11 mi
Time2:51:26
Pace13:05 /mi
📊Positive Split: 55.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:0425:528:2025:52
8:20
-
10K
6.21 mi11:42:2551:138:1525:21
8:10
-0:10
15K
9.32 mi12:08:431:17:318:1926:18
8:28
+0:18
20K
12.43 mi12:35:261:44:148:2326:43
8:36
+0:08
Half
13.11 mi12:41:101:49:588:235:44
8:24
-0:12
25K
15.53 mi13:01:462:10:348:2420:36
8:30
+0:06
30K
18.64 mi13:30:152:39:038:3228:29
9:10
+0:40
20M
20.00 mi13:42:582:51:468:3512:43
9:21
+0:11
21M
21.00 mi13:53:303:02:188:4110:32
10:32
+1:11
35K
21.75 mi14:01:213:10:098:457:51
10:30
-0:02
23M
23.00 mi14:48:193:57:0710:1946:58
37:31
+27:01
24M
24.00 mi15:04:364:13:2410:3416:17
16:17
-21:14
40K
24.85 mi15:17:554:26:4310:4413:19
15:34
-0:43
25.2M
25.20 mi15:22:144:31:0210:454:19
12:31
-3:03
Finish
26.22 mi15:32:364:41:2410:4410:22
10:10
-2:21

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

8:10 /mi

Average Pace

10:44 /mi

Slowest Pace

37:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:24:50

73% of race

Time at Slower Pace

1:16:34

27% of race

Average Pace: 10:44 /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 mi11:17:0425:528:2025:52
8:20
#18865
10K
6.21 mi11:42:2551:138:1525:21
8:10
#18253
15K
9.32 mi12:08:431:17:318:1926:18
8:28
#18499
20K
12.43 mi12:35:261:44:148:2326:43
8:36
#18573
Half
13.11 mi12:41:101:49:588:235:44
8:24
#18569
25K
15.53 mi13:01:462:10:348:2420:36
8:30
#18300
30K
18.64 mi13:30:152:39:038:3228:29
9:10
#18339
20M
20.00 mi13:42:582:51:468:3512:43
9:21
#18358
21M
21.00 mi13:53:303:02:188:4110:32
10:32
#18495
35K
21.75 mi14:01:213:10:098:457:51
10:30
#18798
23M
23.00 mi14:48:193:57:0710:1946:58
37:31
#24276
24M
24.00 mi15:04:364:13:2410:3416:17
16:17
#24746
40K
24.85 mi15:17:554:26:4310:4413:19
15:34
#24981
25.2M
25.20 mi15:22:144:31:0210:454:19
12:31
#24983
Finish
26.22 mi15:32:364:41:2410:4410:22
10:10
#24949
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi18865119831198319130(Top 67%)12109(Top 75%)12109(Top 607%)
10K6.21 mi3.10 mi18253+61211721+26211721+26217614(Top 62%)11500(Top 71%)11500(Top 576%)
15K9.32 mi3.11 mi18499-24611824-10311824-10319130(Top 67%)12109(Top 75%)12109(Top 607%)
20K12.43 mi3.11 mi18573-7411862-3811862-3818841(Top 66%)11973(Top 74%)11973(Top 600%)
Half13.11 mi0.68 mi18569+411857+511857+518613(Top 66%)11886(Top 74%)11886(Top 595%)
25K15.53 mi2.42 mi18300+26911722+13511722+13517176(Top 60%)11175(Top 69%)11175(Top 560%)
30K18.64 mi3.11 mi18339-3911713+911713+918490(Top 65%)11613(Top 72%)11613(Top 582%)
20M20.00 mi1.36 mi18358-1911693+2011693+2018556(Top 65%)11481(Top 71%)11481(Top 575%)
21M21.00 mi1.00 mi18495-13711723-3011723-3020110(Top 71%)12092(Top 75%)12092(Top 606%)
35K21.75 mi0.75 mi18798-30311839-11611839-11623150(Top 82%)13466(Top 84%)13466(Top 675%)
23M23.00 mi1.25 mi24276-547814274-243514274-243528400(Top 100%)16101(Top 100%)16101(Top 807%)
24M24.00 mi1.00 mi24746-47014474-20014474-20028258(Top 99%)16000(Top 99%)16000(Top 802%)
40K24.85 mi0.85 mi24981-23514576-10214576-10227978(Top 99%)15823(Top 98%)15823(Top 793%)
25.2M25.20 mi0.35 mi24983-2145761457624227(Top 85%)13890(Top 86%)13890(Top 696%)
Finish26.22 mi1.02 mi24949+3414549+2714549+2723447(Top 83%)13489(Top 84%)13489(Top 676%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

19130

Males

12109

M50-54

12109

5K→10K

3.1 - 6.2 mi

Top 62%
×5story building
+79ft-138ft

Overall

17614

Males

11500

M50-54

11500

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

19130

Males

12109

M50-54

12109

15K→20K

9.3 - 12.4 mi

Top 66%
×5story building
+106ft-86ft

Overall

18841

Males

11973

M50-54

11973

20K→Half

12.4 - 13.1 mi

Top 66%
×2story building
+19ft-37ft

Overall

18613

Males

11886

M50-54

11886

Half→25K

13.1 - 15.5 mi

Top 60%
×4story building
+66ft-88ft

Overall

17176

Males

11175

M50-54

11175

25K→30K

15.5 - 18.6 mi

Top 65%
×9story building
+181ft-148ft

Overall

18490

Males

11613

M50-54

11613

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

18556

Males

11481

M50-54

11481

20M→21M

20.0 - 21.0 mi

Top 71%
×8story building
+106ft-24ft

Overall

20110

Males

12092

M50-54

12092

21M→35K

21.0 - 21.8 mi

Top 82%
×7story building
+17ft-86ft

Overall

23150

Males

13466

M50-54

13466

35K→23M

21.8 - 23.0 mi

Top 100%
×5story building
+23ft-63ft

Overall

28400

Males

16101

M50-54

16101

23M→24M

23.0 - 24.0 mi

Top 99%
×6story building
+12ft-82ft

Overall

28258

Males

16000

M50-54

16000

24M→40K

24.0 - 24.9 mi

Top 99%
×1story
+6ft-20ft

Overall

27978

Males

15823

M50-54

15823

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

24227

Males

13890

M50-54

13890

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2story building
+22ft-21ft

Overall

23447

Males

13489

M50-54

13489

Passing Analysis

Category:
Athletes Passed
1815
Passed By
7899
Net Change
-6084
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18865
5K → 10K69280+612#18865#18253
10K → 15K112358-246#18253#18499
15K → 20K171245-74#18499#18573
20K → Half3531+4#18573#18569
Half → 25K31344+269#18569#18300
25K → 30K229268-39#18300#18339
30K → 20M108127-19#18339#18358
20M → 21M67204-137#18358#18495
21M → 35K14317-303#18495#18798
35K → 23M15479-5478#18798#24276
23M → 24M2472-470#24276#24746
24M → 40K4239-235#24746#24981
40K → 25.2M1618-2#24981#24983
25.2M → Finish5117+34#24983#24949
TOTALS18157899-6084
📊

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