Boston Marathon logo
BOSTON MARATHON 2025

Alan Xiao

Bib: 15223•M

MI

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 50%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
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
7:40/mi
23:49
↑ 97↓ 3451.5%
10K· 6.21 mi
7:34/mi
47:19
↑ 79↓ 1380.4%
15K· 9.32 mi
7:37/mi
1:11:00
↑ 67↓ 78
20K· 12.43 mi
7:48/mi
1:35:13
↑ 106↓ 860.1%
Half· 13.11 mi
7:37/mi
1:40:25
↑ 19↓ 370.5%
25K· 15.53 mi
8:03/mi
1:59:55
↑ 66↓ 880.2%
30K· 18.64 mi
8:25/mi
2:26:05
↑ 181↓ 1480.2%
20M
8:48/mi
2:38:03
↑ 64↓ 500.2%
21M
9:17/mi
2:47:20
↑ 106↓ 241.6%
35K· 21.75 mi
8:31/mi
2:53:42
↑ 17↓ 861.7%
23M
8:57/mi
3:04:54
↑ 23↓ 630.6%
24M
8:44/mi
3:13:38
↓ 821.3%
40K· 24.85 mi
8:46/mi
3:21:08
↓ 200.3%
25.2M
9:28/mi
3:24:24
↑ 13↓ 160.2%
Finish· 26.22 mi
8:33/mi
3:33:07
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:40:25
Pace7:40 /mi
2nd Half
Distance13.11 mi
Time1:52:42
Pace8:36 /mi
📊Positive Split: 12.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:3923:497:4023:49
7:40
-
10K
6.21 mi11:19:0947:197:3723:30
7:34
-0:06
15K
9.32 mi11:42:501:11:007:3723:41
7:37
+0:03
20K
12.43 mi12:07:031:35:137:4024:13
7:48
+0:11
Half
13.11 mi12:12:151:40:257:405:12
7:37
-0:11
25K
15.53 mi12:31:451:59:557:4319:30
8:03
+0:26
30K
18.64 mi12:57:552:26:057:5026:10
8:25
+0:22
20M
20.00 mi13:09:532:38:037:5411:58
8:48
+0:23
21M
21.00 mi13:19:102:47:207:589:17
9:17
+0:29
35K
21.75 mi13:25:322:53:427:596:22
8:31
-0:46
23M
23.00 mi13:36:443:04:548:0211:12
8:57
+0:26
24M
24.00 mi13:45:283:13:388:048:44
8:44
-0:13
40K
24.85 mi13:52:583:21:088:067:30
8:46
+0:02
25.2M
25.20 mi13:56:143:24:248:073:16
9:28
+0:42
Finish
26.22 mi14:04:573:33:078:088:43
8:33
-0:55

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

7:34 /mi

Average Pace

8:08 /mi

Slowest Pace

9:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:59:55

56% of race

Time at Steady Pace

1:09:27

33% of race

Time at Slower Pace

23:45

11% of race

Average Pace: 8:08 /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 mi10:55:3923:497:4023:49
7:40
#13640
10K
6.21 mi11:19:0947:197:3723:30
7:34
#13165
15K
9.32 mi11:42:501:11:007:3723:41
7:37
#13012
20K
12.43 mi12:07:031:35:137:4024:13
7:48
#13023
Half
13.11 mi12:12:151:40:257:405:12
7:37
#13000
25K
15.53 mi12:31:451:59:557:4319:30
8:03
#13186
30K
18.64 mi12:57:552:26:057:5026:10
8:25
#13388
20M
20.00 mi13:09:532:38:037:5411:58
8:48
#13540
21M
21.00 mi13:19:102:47:207:589:17
9:17
#13612
35K
21.75 mi13:25:322:53:427:596:22
8:31
#13679
23M
23.00 mi13:36:443:04:548:0211:12
8:57
#13835
24M
24.00 mi13:45:283:13:388:048:44
8:44
#13952
40K
24.85 mi13:52:583:21:088:067:30
8:46
#13981
25.2M
25.20 mi13:56:143:24:248:073:16
9:28
#13984
Finish
26.22 mi14:04:573:33:078:088:43
8:33
#14061
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi136409922992212783(Top 45%)9423(Top 59%)9423(Top 572%)
10K6.21 mi3.10 mi13165+4759686+2369686+23612691(Top 45%)9464(Top 59%)9464(Top 574%)
15K9.32 mi3.11 mi13012+1539580+1069580+10612783(Top 45%)9423(Top 59%)9423(Top 572%)
20K12.43 mi3.11 mi13023-119525+559525+5513222(Top 47%)9519(Top 59%)9519(Top 578%)
Half13.11 mi0.68 mi13000+239514+119514+1112732(Top 45%)9355(Top 58%)9355(Top 568%)
25K15.53 mi2.42 mi13186-1869566-529566-5214212(Top 50%)9856(Top 61%)9856(Top 598%)
30K18.64 mi3.11 mi13388-2029587-219587-2114264(Top 50%)9712(Top 60%)9712(Top 589%)
20M20.00 mi1.36 mi13540-1529632-459632-4515670(Top 55%)10222(Top 63%)10222(Top 620%)
21M21.00 mi1.00 mi13612-729616+169616+1615045(Top 53%)9805(Top 61%)9805(Top 595%)
35K21.75 mi0.75 mi13679-679631-159631-1515499(Top 55%)9930(Top 62%)9930(Top 603%)
23M23.00 mi1.25 mi13835-1569661-309661-3015923(Top 56%)10035(Top 62%)10035(Top 609%)
24M24.00 mi1.00 mi13952-1179680-199680-1915914(Top 56%)9989(Top 62%)9989(Top 606%)
40K24.85 mi0.85 mi13981-299667+139667+1315004(Top 53%)9447(Top 59%)9447(Top 573%)
25.2M25.20 mi0.35 mi13984-39663+49663+414388(Top 51%)9117(Top 57%)9117(Top 553%)
Finish26.22 mi1.02 mi14061-779673-109673-1016541(Top 58%)10170(Top 63%)10170(Top 617%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 45%
×21story building
+97ft-345ft

Overall

12783

Males

9423

M55-59

9423

5K→10K

3.1 - 6.2 mi

Top 45%
×5story building
+79ft-138ft

Overall

12691

Males

9464

M55-59

9464

10K→15K

6.2 - 9.3 mi

Top 45%
×3story building
+67ft-78ft

Overall

12783

Males

9423

M55-59

9423

15K→20K

9.3 - 12.4 mi

Top 47%
×5story building
+106ft-86ft

Overall

13222

Males

9519

M55-59

9519

20K→Half

12.4 - 13.1 mi

Top 45%
×2story building
+19ft-37ft

Overall

12732

Males

9355

M55-59

9355

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

14212

Males

9856

M55-59

9856

25K→30K

15.5 - 18.6 mi

Top 50%
×9story building
+181ft-148ft

Overall

14264

Males

9712

M55-59

9712

30K→20M

18.6 - 20.0 mi

Top 55%
×5story building
+64ft-50ft

Overall

15670

Males

10222

M55-59

10222

20M→21M

20.0 - 21.0 mi

Top 53%
×8story building
+106ft-24ft

Overall

15045

Males

9805

M55-59

9805

21M→35K

21.0 - 21.8 mi

Top 55%
×7story building
+17ft-86ft

Overall

15499

Males

9930

M55-59

9930

35K→23M

21.8 - 23.0 mi

Top 56%
×5story building
+23ft-63ft

Overall

15923

Males

10035

M55-59

10035

23M→24M

23.0 - 24.0 mi

Top 56%
×6story building
+12ft-82ft

Overall

15914

Males

9989

M55-59

9989

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

15004

Males

9447

M55-59

9447

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

14388

Males

9117

M55-59

9117

25.2M→Finish

25.2 - 26.2 mi

Top 58%
×2story building
+22ft-21ft

Overall

16541

Males

10170

M55-59

10170

Passing Analysis

Category:
Athletes Passed
1904
Passed By
2325
Net Change
-421
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13640
5K → 10K57398+475#13640#13165
10K → 15K288135+153#13165#13012
15K → 20K207218-11#13012#13023
20K → Half5330+23#13023#13000
Half → 25K110296-186#13000#13186
25K → 30K174376-202#13186#13388
30K → 20M87239-152#13388#13540
20M → 21M81153-72#13540#13612
21M → 35K38105-67#13612#13679
35K → 23M75231-156#13679#13835
23M → 24M55172-117#13835#13952
24M → 40K73102-29#13952#13981
40K → 25.2M4144-3#13981#13984
25.2M → Finish49126-77#13984#14061
TOTALS19042325-421
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing