Boston Marathon logo
BOSTON MARATHON 2025

Jiming Zeng

Bib: 10083•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 35%
Gender (Male)
#0 / 16105
Top 48%
Masters (Masters Men)
#0 / 10463
Top 37%
Division (M45-49)
#0 / 2386
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:52
Rank: #10931
Start → 5K
22:52 | 7:22/mi
10K· 6.21 mi
45:32
Rank: #10564 (+367)
5K → 10K
22:40 | 7:18/mi
15K· 9.32 mi
1:08:23
Rank: #10540 (+24)
10K → 15K
22:51 | 7:21/mi
20K· 12.43 mi
1:31:35
Rank: #10481 (+59)
15K → 20K
23:12 | 7:28/mi
Half· 13.11 mi
1:36:38
Rank: #10487 (-6)
20K → Half
5:03 | 7:24/mi
25K· 15.53 mi
1:54:49
Rank: #10367 (+120)
Half → 25K
18:11 | 7:30/mi
30K· 18.64 mi
2:19:17
Rank: #10324 (+43)
25K → 30K
24:28 | 7:53/mi
20M
2:30:00
Rank: #10250 (+74)
30K → 20M
10:43 | 7:53/mi
21M
2:38:27
Rank: #10206 (+44)
20M → 21M
8:27 | 8:27/mi
35K· 21.75 mi
2:44:07
Rank: #10145 (+61)
21M → 35K
5:40 | 7:34/mi
23M
2:54:09
Rank: #10113 (+32)
35K → 23M
10:02 | 8:01/mi
24M
3:01:47
Rank: #10018 (+95)
23M → 24M
7:38 | 7:38/mi
40K· 24.85 mi
3:08:28
Rank: #9924 (+94)
24M → 40K
6:41 | 7:49/mi
25.2M
3:11:30
Rank: #9936 (-12)
40K → 25.2M
3:02 | 8:48/mi
Finish· 26.22 mi
3:19:21
Rank: #9946 (-10)
25.2M → Finish
7:51 | 7:42/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
Time1:36:38
Pace7:22 /mi
2nd Half
Distance13.11 mi
Time1:42:43
Pace7:50 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:1722:527:2222:52
7:22
-
10K
6.21 mi11:11:5745:327:2022:40
7:18
-0:04
15K
9.32 mi11:34:481:08:237:2022:51
7:21
+0:03
20K
12.43 mi11:58:001:31:357:2223:12
7:28
+0:07
Half
13.11 mi12:03:031:36:387:225:03
7:24
-0:04
25K
15.53 mi12:21:141:54:497:2318:11
7:30
+0:06
30K
18.64 mi12:45:422:19:177:2824:28
7:53
+0:23
20M
20.00 mi12:56:252:30:007:3010:43
7:53
0:00
21M
21.00 mi13:04:522:38:277:338:27
8:27
+0:34
35K
21.75 mi13:10:322:44:077:335:40
7:34
-0:53
23M
23.00 mi13:20:342:54:097:3410:02
8:01
+0:27
24M
24.00 mi13:28:123:01:477:347:38
7:38
-0:23
40K
24.85 mi13:34:533:08:287:356:41
7:49
+0:11
25.2M
25.20 mi13:37:553:11:307:363:02
8:48
+0:59
Finish
26.22 mi13:45:463:19:217:377:51
7:42
-1:06

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

7:18 /mi

Average Pace

7:37 /mi

Slowest Pace

8:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:13:26

37% of race

Time at Steady Pace

1:09:13

35% of race

Time at Slower Pace

56:42

28% of race

Average Pace: 7:36 /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 mi10:49:1722:527:2222:52
7:22
#10931
10K
6.21 mi11:11:5745:327:2022:40
7:18
#10564
15K
9.32 mi11:34:481:08:237:2022:51
7:21
#10540
20K
12.43 mi11:58:001:31:357:2223:12
7:28
#10481
Half
13.11 mi12:03:031:36:387:225:03
7:24
#10487
25K
15.53 mi12:21:141:54:497:2318:11
7:30
#10367
30K
18.64 mi12:45:422:19:177:2824:28
7:53
#10324
20M
20.00 mi12:56:252:30:007:3010:43
7:53
#10250
21M
21.00 mi13:04:522:38:277:338:27
8:27
#10206
35K
21.75 mi13:10:322:44:077:335:40
7:34
#10145
23M
23.00 mi13:20:342:54:097:3410:02
8:01
#10113
24M
24.00 mi13:28:123:01:477:347:38
7:38
#10018
40K
24.85 mi13:34:533:08:287:356:41
7:49
#9924
25.2M
25.20 mi13:37:553:11:307:363:02
8:48
#9936
Finish
26.22 mi13:45:463:19:217:377:51
7:42
#9946
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi109318656865610438(Top 37%)8320(Top 52%)8320(Top 349%)
10K6.21 mi3.10 mi10564+3678454+2028454+20210304(Top 36%)8312(Top 52%)8312(Top 348%)
15K9.32 mi3.11 mi10540+248419+358419+3510438(Top 37%)8320(Top 52%)8320(Top 349%)
20K12.43 mi3.11 mi10481+598362+578362+5710466(Top 37%)8242(Top 51%)8242(Top 345%)
Half13.11 mi0.68 mi10487-68365-38365-310811(Top 38%)8436(Top 52%)8436(Top 354%)
25K15.53 mi2.42 mi10367+1208266+998266+999933(Top 35%)7833(Top 49%)7833(Top 328%)
30K18.64 mi3.11 mi10324+438187+798187+7910444(Top 37%)7902(Top 49%)7902(Top 331%)
20M20.00 mi1.36 mi10250+748105+828105+829604(Top 34%)7317(Top 45%)7317(Top 307%)
21M21.00 mi1.00 mi10206+448034+718034+7110143(Top 36%)7440(Top 46%)7440(Top 312%)
35K21.75 mi0.75 mi10145+617983+517983+519142(Top 32%)6932(Top 43%)6932(Top 291%)
23M23.00 mi1.25 mi10113+327927+567927+5610097(Top 36%)7282(Top 45%)7282(Top 305%)
24M24.00 mi1.00 mi10018+957838+897838+898644(Top 30%)6464(Top 40%)6464(Top 271%)
40K24.85 mi0.85 mi9924+947760+787760+788871(Top 31%)6453(Top 40%)6453(Top 270%)
25.2M25.20 mi0.35 mi9936-127753+77753+710544(Top 37%)7236(Top 45%)7236(Top 303%)
Finish26.22 mi1.02 mi9946-107726+277726+2710699(Top 38%)7354(Top 46%)7354(Top 308%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21stories
+97ft-345ft

Overall

10438

Males

8320

M45-49

8320

5K→10K

3.1 - 6.2 mi

Top 36%
×5stories
+79ft-138ft

Overall

10304

Males

8312

M45-49

8312

10K→15K

6.2 - 9.3 mi

Top 37%
×3stories
+67ft-78ft

Overall

10438

Males

8320

M45-49

8320

15K→20K

9.3 - 12.4 mi

Top 37%
×5stories
+106ft-86ft

Overall

10466

Males

8242

M45-49

8242

20K→Half

12.4 - 13.1 mi

Top 38%
×2stories
+19ft-37ft

Overall

10811

Males

8436

M45-49

8436

Half→25K

13.1 - 15.5 mi

Top 35%
×4stories
+66ft-88ft

Overall

9933

Males

7833

M45-49

7833

25K→30K

15.5 - 18.6 mi

Top 37%
×9stories
+181ft-148ft

Overall

10444

Males

7902

M45-49

7902

30K→20M

18.6 - 20.0 mi

Top 34%
×5stories
+64ft-50ft

Overall

9604

Males

7317

M45-49

7317

20M→21M

20.0 - 21.0 mi

Top 36%
×8stories
+106ft-24ft

Overall

10143

Males

7440

M45-49

7440

21M→35K

21.0 - 21.8 mi

Top 32%
×7stories
+17ft-86ft

Overall

9142

Males

6932

M45-49

6932

35K→23M

21.8 - 23.0 mi

Top 36%
×5stories
+23ft-63ft

Overall

10097

Males

7282

M45-49

7282

23M→24M

23.0 - 24.0 mi

Top 30%
×6stories
+12ft-82ft

Overall

8644

Males

6464

M45-49

6464

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8871

Males

6453

M45-49

6453

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

10544

Males

7236

M45-49

7236

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2stories
+22ft-21ft

Overall

10699

Males

7354

M45-49

7354

Passing Analysis

Category:
Athletes Passed
2186
Passed By
1199
Net Change
+985
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10931
5K → 10K483116+367#10931#10564
10K → 15K176152+24#10564#10540
15K → 20K200141+59#10540#10481
20K → Half3743-6#10481#10487
Half → 25K21090+120#10487#10367
25K → 30K254210+43#10367#10324
30K → 20M14975+74#10324#10250
20M → 21M12783+44#10250#10206
21M → 35K9534+61#10206#10145
35K → 23M11482+32#10145#10113
23M → 24M12529+95#10113#10018
24M → 40K11521+94#10018#9924
40K → 25.2M2941-12#9924#9936
25.2M → Finish7282-10#9936#9946
TOTALS21861199+985
📊

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