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BOSTON MARATHON 2025

Jun Xiao

Bib: 21481•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M60-64)
#0 / 1259
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
7:47/mi
24:10
↑ 97↓ 3451.5%
10K· 6.21 mi
8:07/mi
49:23
↑ 79↓ 1380.4%
15K· 9.32 mi
9:57/mi
1:20:17
↑ 67↓ 78
20K· 12.43 mi
9:23/mi
1:49:27
↑ 106↓ 860.1%
Half· 13.11 mi
9:58/mi
1:56:15
↑ 19↓ 370.5%
25K· 15.53 mi
10:29/mi
2:21:40
↑ 66↓ 880.2%
30K· 18.64 mi
10:48/mi
2:55:12
↑ 181↓ 1480.2%
20M
11:15/mi
3:10:29
↑ 64↓ 500.2%
21M
11:12/mi
3:21:41
↑ 106↓ 241.6%
35K· 21.75 mi
13:23/mi
3:31:42
↑ 17↓ 861.7%
23M
11:40/mi
3:46:19
↑ 23↓ 630.6%
24M
10:36/mi
3:56:55
↓ 821.3%
40K· 24.85 mi
16:28/mi
4:11:00
↓ 200.3%
25.2M
14:50/mi
4:16:07
↑ 13↓ 160.2%
Finish· 26.22 mi
11:49/mi
4:28:10
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:15
Pace8:52 /mi
2nd Half
Distance13.11 mi
Time2:31:55
Pace11:35 /mi
📊Positive Split: 30.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:4124:107:4724:10
7:47
-
10K
6.21 mi11:44:5449:237:5725:13
8:07
+0:20
15K
9.32 mi12:15:481:20:178:3730:54
9:57
+1:50
20K
12.43 mi12:44:581:49:278:4829:10
9:23
-0:34
Half
13.11 mi12:51:461:56:158:526:48
9:58
+0:35
25K
15.53 mi13:17:112:21:409:0725:25
10:29
+0:31
30K
18.64 mi13:50:432:55:129:2433:32
10:48
+0:19
20M
20.00 mi14:06:003:10:299:3115:17
11:15
+0:27
21M
21.00 mi14:17:123:21:419:3611:12
11:12
-0:03
35K
21.75 mi14:27:133:31:429:4410:01
13:23
+2:11
23M
23.00 mi14:41:503:46:199:5014:37
11:40
-1:43
24M
24.00 mi14:52:263:56:559:5210:36
10:36
-1:04
40K
24.85 mi15:06:314:11:0010:0614:05
16:28
+5:52
25.2M
25.20 mi15:11:384:16:0710:105:07
14:50
-1:38
Finish
26.22 mi15:23:414:28:1010:1412:03
11:49
-3:01

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

7:47 /mi

Average Pace

10:14 /mi

Slowest Pace

16:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:18:33

29% of race

Time at Steady Pace

2:40:24

60% of race

Time at Slower Pace

29:13

11% of race

Average Pace: 10:14 /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 mi11:19:4124:107:4724:10
7:47
#14614
10K
6.21 mi11:44:5449:237:5725:13
8:07
#16084
15K
9.32 mi12:15:481:20:178:3730:54
9:57
#20281
20K
12.43 mi12:44:581:49:278:4829:10
9:23
#20964
Half
13.11 mi12:51:461:56:158:526:48
9:58
#21262
25K
15.53 mi13:17:112:21:409:0725:25
10:29
#22101
30K
18.64 mi13:50:432:55:129:2433:32
10:48
#22484
20M
20.00 mi14:06:003:10:299:3115:17
11:15
#22637
21M
21.00 mi14:17:123:21:419:3611:12
11:12
#22576
35K
21.75 mi14:27:133:31:429:4410:01
13:23
#22897
23M
23.00 mi14:41:503:46:199:5014:37
11:40
#23025
24M
24.00 mi14:52:263:56:559:5210:36
10:36
#23030
40K
24.85 mi15:06:314:11:0010:0614:05
16:28
#23576
25.2M
25.20 mi15:11:384:16:0710:105:07
14:50
#23676
Finish
26.22 mi15:23:414:28:1010:1412:03
11:49
#23826
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi14614102851028524890(Top 88%)14663(Top 91%)14663(Top 1165%)
10K6.21 mi3.10 mi16084-147010846-56110846-56117319(Top 61%)11382(Top 71%)11382(Top 904%)
15K9.32 mi3.11 mi20281-419712595-174912595-174924890(Top 88%)14663(Top 91%)14663(Top 1165%)
20K12.43 mi3.11 mi20964-68312894-29912894-29922540(Top 79%)13599(Top 84%)13599(Top 1080%)
Half13.11 mi0.68 mi21262-29813025-13113025-13124747(Top 87%)14548(Top 90%)14548(Top 1156%)
25K15.53 mi2.42 mi22101-83913386-36113386-36124352(Top 86%)14352(Top 89%)14352(Top 1140%)
30K18.64 mi3.11 mi22484-38313519-13313519-13323589(Top 83%)13878(Top 86%)13878(Top 1102%)
20M20.00 mi1.36 mi22637-15313569-5013569-5024085(Top 85%)14024(Top 87%)14024(Top 1114%)
21M21.00 mi1.00 mi22576+6113526+4313526+4321906(Top 77%)12935(Top 80%)12935(Top 1027%)
35K21.75 mi0.75 mi22897-32113653-12713653-12727285(Top 96%)15481(Top 96%)15481(Top 1230%)
23M23.00 mi1.25 mi23025-12813689-3613689-3624551(Top 86%)14121(Top 88%)14121(Top 1122%)
24M24.00 mi1.00 mi23030-513664+2513664+2523072(Top 81%)13343(Top 83%)13343(Top 1060%)
40K24.85 mi0.85 mi23576-54613910-24613910-24628194(Top 99%)15961(Top 99%)15961(Top 1268%)
25.2M25.20 mi0.35 mi23676-10013953-4313953-4327003(Top 95%)15267(Top 95%)15267(Top 1213%)
Finish26.22 mi1.02 mi23826-15014016-6314016-6326577(Top 94%)15084(Top 94%)15084(Top 1198%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 88%
×21story building
+97ft-345ft

Overall

24890

Males

14663

M60-64

14663

5K→10K

3.1 - 6.2 mi

Top 61%
×5story building
+79ft-138ft

Overall

17319

Males

11382

M60-64

11382

10K→15K

6.2 - 9.3 mi

Top 88%
×3story building
+67ft-78ft

Overall

24890

Males

14663

M60-64

14663

15K→20K

9.3 - 12.4 mi

Top 79%
×5story building
+106ft-86ft

Overall

22540

Males

13599

M60-64

13599

20K→Half

12.4 - 13.1 mi

Top 87%
×2story building
+19ft-37ft

Overall

24747

Males

14548

M60-64

14548

Half→25K

13.1 - 15.5 mi

Top 86%
×4story building
+66ft-88ft

Overall

24352

Males

14352

M60-64

14352

25K→30K

15.5 - 18.6 mi

Top 83%
×9story building
+181ft-148ft

Overall

23589

Males

13878

M60-64

13878

30K→20M

18.6 - 20.0 mi

Top 85%
×5story building
+64ft-50ft

Overall

24085

Males

14024

M60-64

14024

20M→21M

20.0 - 21.0 mi

Top 77%
×8story building
+106ft-24ft

Overall

21906

Males

12935

M60-64

12935

21M→35K

21.0 - 21.8 mi

Top 96%
×7story building
+17ft-86ft

Overall

27285

Males

15481

M60-64

15481

35K→23M

21.8 - 23.0 mi

Top 86%
×5story building
+23ft-63ft

Overall

24551

Males

14121

M60-64

14121

23M→24M

23.0 - 24.0 mi

Top 81%
×6story building
+12ft-82ft

Overall

23072

Males

13343

M60-64

13343

24M→40K

24.0 - 24.9 mi

Top 99%
×1story
+6ft-20ft

Overall

28194

Males

15961

M60-64

15961

40K→25.2M

24.9 - 25.2 mi

Top 95%
×1story
+13ft-16ft

Overall

27003

Males

15267

M60-64

15267

25.2M→Finish

25.2 - 26.2 mi

Top 94%
×2story building
+22ft-21ft

Overall

26577

Males

15084

M60-64

15084

Passing Analysis

Category:
Athletes Passed
470
Passed By
9682
Net Change
-9212
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14614
5K → 10K401510-1470#14614#16084
10K → 15K44201-4197#16084#20281
15K → 20K58741-683#20281#20964
20K → Half3301-298#20964#21262
Half → 25K19858-839#21262#22101
25K → 30K93476-383#22101#22484
30K → 20M37190-153#22484#22637
20M → 21M10443+61#22637#22576
21M → 35K6327-321#22576#22897
35K → 23M36164-128#22897#23025
23M → 24M5762-5#23025#23030
24M → 40K2548-546#23030#23576
40K → 25.2M2102-100#23576#23676
25.2M → Finish9159-150#23676#23826
TOTALS4709682-9212
📊

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