Boston Marathon logo
BOSTON MARATHON 2025

Jiangbo Li

Bib: 6836•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 28%
Gender (Male)
#0 / 16105
Top 41%
Masters (Masters Men)
#0 / 10463
Top 29%
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:26
Rank: #7069
Start → 5K
21:26 | 6:54/mi
10K· 6.21 mi
42:40
Rank: #6903 (+166)
5K → 10K
21:14 | 6:50/mi
15K· 9.32 mi
1:04:10
Rank: #6951 (-48)
10K → 15K
21:30 | 6:55/mi
20K· 12.43 mi
1:26:41
Rank: #7330 (-379)
15K → 20K
22:31 | 7:15/mi
Half· 13.11 mi
1:31:38
Rank: #7426 (-96)
20K → Half
4:57 | 7:15/mi
25K· 15.53 mi
1:49:17
Rank: #7482 (-56)
Half → 25K
17:39 | 7:17/mi
30K· 18.64 mi
2:13:21
Rank: #7698 (-216)
25K → 30K
24:04 | 7:45/mi
20M
2:23:53
Rank: #7701 (-3)
30K → 20M
10:32 | 7:45/mi
21M
2:33:11
Rank: #8089 (-388)
20M → 21M
9:18 | 9:18/mi
35K· 21.75 mi
2:38:54
Rank: #8097 (-8)
21M → 35K
5:43 | 7:38/mi
23M
2:48:55
Rank: #8174 (-77)
35K → 23M
10:01 | 8:00/mi
24M
2:56:25
Rank: #8111 (+63)
23M → 24M
7:30 | 7:30/mi
40K· 24.85 mi
3:02:46
Rank: #8007 (+104)
24M → 40K
6:21 | 7:26/mi
25.2M
3:05:41
Rank: #7999 (+8)
40K → 25.2M
2:55 | 8:27/mi
Finish· 26.22 mi
3:13:31
Rank: #8070 (-71)
25.2M → Finish
7:50 | 7:41/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
Time1:31:38
Pace6:59 /mi
2nd Half
Distance13.11 mi
Time1:41:53
Pace7:46 /mi
📊Positive Split: 11.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:29:0321:266:5421:26
6:54
-
10K
6.21 mi10:50:1742:406:5221:14
6:50
-0:04
15K
9.32 mi11:11:471:04:106:5321:30
6:55
+0:05
20K
12.43 mi11:34:181:26:416:5922:31
7:15
+0:20
Half
13.11 mi11:39:151:31:386:594:57
7:15
0:00
25K
15.53 mi11:56:541:49:177:0217:39
7:17
+0:02
30K
18.64 mi12:20:582:13:217:0924:04
7:45
+0:28
20M
20.00 mi12:31:302:23:537:1210:32
7:45
0:00
21M
21.00 mi12:40:482:33:117:189:18
9:18
+1:33
35K
21.75 mi12:46:312:38:547:185:43
7:38
-1:40
23M
23.00 mi12:56:322:48:557:2110:01
8:00
+0:22
24M
24.00 mi13:04:022:56:257:217:30
7:30
-0:30
40K
24.85 mi13:10:233:02:467:216:21
7:26
-0:04
25.2M
25.20 mi13:13:183:05:417:222:55
8:27
+1:01
Finish
26.22 mi13:21:083:13:317:237:50
7:41
-0:46

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

6:50 /mi

Average Pace

7:23 /mi

Slowest Pace

9:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:04:10

33% of race

Time at Steady Pace

1:47:07

55% of race

Time at Slower Pace

22:14

11% of race

Average Pace: 7:23 /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 mi10:29:0321:266:5421:26
6:54
#7069
10K
6.21 mi10:50:1742:406:5221:14
6:50
#6903
15K
9.32 mi11:11:471:04:106:5321:30
6:55
#6951
20K
12.43 mi11:34:181:26:416:5922:31
7:15
#7330
Half
13.11 mi11:39:151:31:386:594:57
7:15
#7426
25K
15.53 mi11:56:541:49:177:0217:39
7:17
#7482
30K
18.64 mi12:20:582:13:217:0924:04
7:45
#7698
20M
20.00 mi12:31:302:23:537:1210:32
7:45
#7701
21M
21.00 mi12:40:482:33:117:189:18
9:18
#8089
35K
21.75 mi12:46:312:38:547:185:43
7:38
#8097
23M
23.00 mi12:56:322:48:557:2110:01
8:00
#8174
24M
24.00 mi13:04:022:56:257:217:30
7:30
#8111
40K
24.85 mi13:10:233:02:467:216:21
7:26
#8007
25.2M
25.20 mi13:13:183:05:417:222:55
8:27
#7999
Finish
26.22 mi13:21:083:13:317:237:50
7:41
#8070
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi7069635663567091(Top 25%)6319(Top 39%)6319(Top 281%)
10K6.21 mi3.10 mi6903+1666221+1356221+1356738(Top 24%)6076(Top 38%)6076(Top 270%)
15K9.32 mi3.11 mi6951-486246-256246-257091(Top 25%)6319(Top 39%)6319(Top 281%)
20K12.43 mi3.11 mi7330-3796515-2696515-2698585(Top 30%)7214(Top 45%)7214(Top 321%)
Half13.11 mi0.68 mi7426-966578-636578-639516(Top 34%)7751(Top 48%)7751(Top 345%)
25K15.53 mi2.42 mi7482-566597-196597-198195(Top 29%)6877(Top 43%)6877(Top 306%)
30K18.64 mi3.11 mi7698-2166689-926689-929509(Top 33%)7431(Top 46%)7431(Top 331%)
20M20.00 mi1.36 mi7701-36660+296660+298698(Top 31%)6839(Top 42%)6839(Top 304%)
21M21.00 mi1.00 mi8089-3886858-1986858-19815119(Top 53%)9831(Top 61%)9831(Top 438%)
35K21.75 mi0.75 mi8097-86844+146844+149588(Top 34%)7142(Top 44%)7142(Top 318%)
23M23.00 mi1.25 mi8174-776849-56849-59989(Top 35%)7218(Top 45%)7218(Top 321%)
24M24.00 mi1.00 mi8111+636771+786771+787668(Top 27%)5916(Top 37%)5916(Top 263%)
40K24.85 mi0.85 mi8007+1046675+966675+966360(Top 22%)5069(Top 31%)5069(Top 226%)
25.2M25.20 mi0.35 mi7999+86658+176658+178493(Top 30%)6178(Top 38%)6178(Top 275%)
Finish26.22 mi1.02 mi8070-716670-126670-1210575(Top 37%)7283(Top 45%)7283(Top 324%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21stories
+97ft-345ft

Overall

7091

Males

6319

M40-44

6319

5K→10K

3.1 - 6.2 mi

Top 24%
×5stories
+79ft-138ft

Overall

6738

Males

6076

M40-44

6076

10K→15K

6.2 - 9.3 mi

Top 25%
×3stories
+67ft-78ft

Overall

7091

Males

6319

M40-44

6319

15K→20K

9.3 - 12.4 mi

Top 30%
×5stories
+106ft-86ft

Overall

8585

Males

7214

M40-44

7214

20K→Half

12.4 - 13.1 mi

Top 34%
×2stories
+19ft-37ft

Overall

9516

Males

7751

M40-44

7751

Half→25K

13.1 - 15.5 mi

Top 29%
×4stories
+66ft-88ft

Overall

8195

Males

6877

M40-44

6877

25K→30K

15.5 - 18.6 mi

Top 33%
×9stories
+181ft-148ft

Overall

9509

Males

7431

M40-44

7431

30K→20M

18.6 - 20.0 mi

Top 31%
×5stories
+64ft-50ft

Overall

8698

Males

6839

M40-44

6839

20M→21M

20.0 - 21.0 mi

Top 53%
×8stories
+106ft-24ft

Overall

15119

Males

9831

M40-44

9831

21M→35K

21.0 - 21.8 mi

Top 34%
×7stories
+17ft-86ft

Overall

9588

Males

7142

M40-44

7142

35K→23M

21.8 - 23.0 mi

Top 35%
×5stories
+23ft-63ft

Overall

9989

Males

7218

M40-44

7218

23M→24M

23.0 - 24.0 mi

Top 27%
×6stories
+12ft-82ft

Overall

7668

Males

5916

M40-44

5916

24M→40K

24.0 - 24.9 mi

Top 22%
×1story
+6ft-20ft

Overall

6360

Males

5069

M40-44

5069

40K→25.2M

24.9 - 25.2 mi

Top 30%
×1story
+13ft-16ft

Overall

8493

Males

6178

M40-44

6178

25.2M→Finish

25.2 - 26.2 mi

Top 37%
×2stories
+22ft-21ft

Overall

10575

Males

7283

M40-44

7283

Passing Analysis

Category:
Athletes Passed
1247
Passed By
2248
Net Change
-1001
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7069
5K → 10K275109+166#7069#6903
10K → 15K122170-48#6903#6951
15K → 20K46425-379#6951#7330
20K → Half9105-96#7330#7426
Half → 25K90146-56#7426#7482
25K → 30K125341-216#7482#7698
30K → 20M8992-3#7698#7701
20M → 21M29417-388#7701#8089
21M → 35K5563-8#8089#8097
35K → 23M87164-77#8097#8174
23M → 24M11047+63#8174#8111
24M → 40K11612+104#8111#8007
40K → 25.2M4032+8#8007#7999
25.2M → Finish54125-71#7999#8070
TOTALS12472248-1001
📊

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