Boston Marathon logo
BOSTON MARATHON 2025

Xin Li

Bib: 891•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:30
Rank: #950
Start → 5K
18:30 | 5:57/mi
10K· 6.21 mi
37:22
Rank: #1115 (-165)
5K → 10K
18:52 | 6:04/mi
15K· 9.32 mi
56:23
Rank: #1204 (-89)
10K → 15K
19:01 | 6:07/mi
20K· 12.43 mi
1:15:50
Rank: #1332 (-128)
15K → 20K
19:27 | 6:16/mi
Half· 13.11 mi
1:19:59
Rank: #1345 (-13)
20K → Half
4:09 | 6:05/mi
25K· 15.53 mi
1:35:25
Rank: #1444 (-99)
Half → 25K
15:26 | 6:22/mi
30K· 18.64 mi
1:59:33
Rank: #2523 (-1079)
25K → 30K
24:08 | 7:46/mi
20M
2:08:58
Rank: #2567 (-44)
30K → 20M
9:25 | 6:56/mi
21M
2:16:20
Rank: #2623 (-56)
20M → 21M
7:22 | 7:22/mi
35K· 21.75 mi
2:22:48
Rank: #3003 (-380)
21M → 35K
6:28 | 8:39/mi
23M
3:22:47
Rank: #18969 (-15966)
35K → 23M
59:59 | 47:54/mi
24M
3:30:16
Rank: #18532 (+437)
23M → 24M
7:29 | 7:29/mi
40K· 24.85 mi
3:36:22
Rank: #18040 (+492)
24M → 40K
6:06 | 7:08/mi
25.2M
3:39:08
Rank: #17865 (+175)
40K → 25.2M
2:46 | 8:01/mi
Finish· 26.22 mi
3:46:18
Rank: #17451 (+414)
25.2M → Finish
7:10 | 7:02/mi

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
Time1:19:59
Pace6:06 /mi
2nd Half
Distance13.11 mi
Time2:26:19
Pace11:10 /mi
📊Positive Split: 82.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:5118:305:5718:30
5:57
-
10K
6.21 mi10:37:4337:226:0118:52
6:04
+0:07
15K
9.32 mi10:56:4456:236:0319:01
6:07
+0:03
20K
12.43 mi11:16:111:15:506:0619:27
6:16
+0:09
Half
13.11 mi11:20:201:19:596:064:09
6:05
-0:11
25K
15.53 mi11:35:461:35:256:0915:26
6:22
+0:17
30K
18.64 mi11:59:541:59:336:2524:08
7:46
+1:24
20M
20.00 mi12:09:192:08:586:279:25
6:56
-0:50
21M
21.00 mi12:16:412:16:206:307:22
7:22
+0:26
35K
21.75 mi12:23:092:22:486:346:28
8:39
+1:17
23M
23.00 mi13:23:083:22:478:4959:59
47:54
+39:15
24M
24.00 mi13:30:373:30:168:467:29
7:29
-40:25
40K
24.85 mi13:36:433:36:228:426:06
7:08
-0:21
25.2M
25.20 mi13:39:293:39:088:422:46
8:01
+0:53
Finish
26.22 mi13:46:393:46:188:387:10
7:02
-0:59

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

5:57 /mi

Average Pace

8:38 /mi

Slowest Pace

47:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:46:19

73% of race

Time at Slower Pace

59:59

27% of race

Average Pace: 8:38 /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 mi10:18:5118:305:5718:30
5:57
#950
10K
6.21 mi10:37:4337:226:0118:52
6:04
#1115
15K
9.32 mi10:56:4456:236:0319:01
6:07
#1204
20K
12.43 mi11:16:111:15:506:0619:27
6:16
#1332
Half
13.11 mi11:20:201:19:596:064:09
6:05
#1345
25K
15.53 mi11:35:461:35:256:0915:26
6:22
#1444
30K
18.64 mi11:59:541:59:336:2524:08
7:46
#2523
20M
20.00 mi12:09:192:08:586:279:25
6:56
#2567
21M
21.00 mi12:16:412:16:206:307:22
7:22
#2623
35K
21.75 mi12:23:092:22:486:346:28
8:39
#3003
23M
23.00 mi13:23:083:22:478:4959:59
47:54
#18969
24M
24.00 mi13:30:373:30:168:467:29
7:29
#18532
40K
24.85 mi13:36:433:36:228:426:06
7:08
#18040
25.2M
25.20 mi13:39:293:39:088:422:46
8:01
#17865
Finish
26.22 mi13:46:393:46:188:387:10
7:02
#17451
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi9508928921491(Top 5%)1420(Top 9%)1420(Top 25%)
10K6.21 mi3.10 mi1115-1651052-1601052-1601381(Top 5%)1311(Top 8%)1311(Top 23%)
15K9.32 mi3.11 mi1204-891141-891141-891491(Top 5%)1420(Top 9%)1420(Top 25%)
20K12.43 mi3.11 mi1332-1281263-1221263-1221844(Top 6%)1755(Top 11%)1755(Top 31%)
Half13.11 mi0.68 mi1345-131275-121275-121513(Top 5%)1441(Top 9%)1441(Top 26%)
25K15.53 mi2.42 mi1444-991372-971372-972197(Top 8%)2092(Top 13%)2092(Top 37%)
30K18.64 mi3.11 mi2523-10792409-10372409-10379683(Top 34%)7529(Top 47%)7529(Top 133%)
20M20.00 mi1.36 mi2567-442451-422451-423713(Top 13%)3419(Top 21%)3419(Top 61%)
21M21.00 mi1.00 mi2623-562499-482499-483972(Top 14%)3607(Top 22%)3607(Top 64%)
35K21.75 mi0.75 mi3003-3802843-3442843-34416310(Top 57%)10319(Top 64%)10319(Top 183%)
23M23.00 mi1.25 mi18969-1596611883-904011883-904028403(Top 100%)16104(Top 100%)16104(Top 285%)
24M24.00 mi1.00 mi18532+43711666+21711666+2177584(Top 27%)5873(Top 36%)5873(Top 104%)
40K24.85 mi0.85 mi18040+49211425+24111425+2414699(Top 17%)4004(Top 25%)4004(Top 71%)
25.2M25.20 mi0.35 mi17865+17511336+8911336+896096(Top 21%)4822(Top 30%)4822(Top 85%)
Finish26.22 mi1.02 mi17451+41411119+21711119+2175958(Top 21%)4716(Top 29%)4716(Top 84%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
×21stories
+97ft-345ft

Overall

1491

Males

1420

M18-39

1420

5K→10K

3.1 - 6.2 mi

Top 5%
×5stories
+79ft-138ft

Overall

1381

Males

1311

M18-39

1311

10K→15K

6.2 - 9.3 mi

Top 5%
×3stories
+67ft-78ft

Overall

1491

Males

1420

M18-39

1420

15K→20K

9.3 - 12.4 mi

Top 6%
×5stories
+106ft-86ft

Overall

1844

Males

1755

M18-39

1755

20K→Half

12.4 - 13.1 mi

Top 5%
×2stories
+19ft-37ft

Overall

1513

Males

1441

M18-39

1441

Half→25K

13.1 - 15.5 mi

Top 8%
×4stories
+66ft-88ft

Overall

2197

Males

2092

M18-39

2092

25K→30K

15.5 - 18.6 mi

Top 34%
×9stories
+181ft-148ft

Overall

9683

Males

7529

M18-39

7529

30K→20M

18.6 - 20.0 mi

Top 13%
×5stories
+64ft-50ft

Overall

3713

Males

3419

M18-39

3419

20M→21M

20.0 - 21.0 mi

Top 14%
×8stories
+106ft-24ft

Overall

3972

Males

3607

M18-39

3607

21M→35K

21.0 - 21.8 mi

Top 57%
×7stories
+17ft-86ft

Overall

16310

Males

10319

M18-39

10319

35K→23M

21.8 - 23.0 mi

Top 100%
×5stories
+23ft-63ft

Overall

28403

Males

16104

M18-39

16104

23M→24M

23.0 - 24.0 mi

Top 27%
×6stories
+12ft-82ft

Overall

7584

Males

5873

M18-39

5873

24M→40K

24.0 - 24.9 mi

Top 17%
×1story
+6ft-20ft

Overall

4699

Males

4004

M18-39

4004

40K→25.2M

24.9 - 25.2 mi

Top 21%
×1story
+13ft-16ft

Overall

6096

Males

4822

M18-39

4822

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2stories
+22ft-21ft

Overall

5958

Males

4716

M18-39

4716

Passing Analysis

Category:
Athletes Passed
1655
Passed By
18154
Net Change
-16501
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#950
5K → 10K13178-165#950#1115
10K → 15K11100-89#1115#1204
15K → 20K16144-128#1204#1332
20K → Half417-13#1332#1345
Half → 25K17116-99#1345#1444
25K → 30K01079-1079#1444#2523
30K → 20M3882-44#2523#2567
20M → 21M3490-56#2567#2623
21M → 35K4384-380#2623#3003
35K → 23M015964-15966#3003#18969
23M → 24M4370+437#18969#18532
24M → 40K4920+492#18532#18040
40K → 25.2M1750+175#18040#17865
25.2M → Finish4140+414#17865#17451
TOTALS165518154-16501
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing