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BOSTON MARATHON 2025

Zhengren Niu

Bib: 12468•M

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 33%
Gender (Male)
#0 / 16105
Top 46%
Masters (Masters Men)
#0 / 10463
Top 34%
Division (M55-59)
#0 / 1648
Top 15%
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
7:25/mi
23:04
↑ 97↓ 3451.5%
10K· 6.21 mi
7:19/mi
45:48
↑ 79↓ 1380.4%
15K· 9.32 mi
7:21/mi
1:08:39
↑ 67↓ 78
20K· 12.43 mi
7:29/mi
1:31:53
↑ 106↓ 860.1%
Half· 13.11 mi
7:18/mi
1:36:52
↑ 19↓ 370.5%
25K· 15.53 mi
7:31/mi
1:55:05
↑ 66↓ 880.2%
30K· 18.64 mi
7:48/mi
2:19:19
↑ 181↓ 1480.2%
20M
7:50/mi
2:29:58
↑ 64↓ 500.2%
21M
8:08/mi
2:38:06
↑ 106↓ 241.6%
35K· 21.75 mi
7:36/mi
2:43:47
↑ 17↓ 861.7%
23M
7:36/mi
2:53:18
↑ 23↓ 630.6%
24M
7:27/mi
3:00:45
↓ 821.3%
40K· 24.85 mi
7:31/mi
3:07:11
↓ 200.3%
25.2M
8:13/mi
3:10:01
↑ 13↓ 160.2%
Finish· 26.22 mi
7:01/mi
3:17:10
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:52
Pace7:23 /mi
2nd Half
Distance13.11 mi
Time1:40:18
Pace7:39 /mi
📊Positive Split: 3.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:1823:047:2523:04
7:25
-
10K
6.21 mi11:14:0245:487:2222:44
7:19
-0:06
15K
9.32 mi11:36:531:08:397:2222:51
7:21
+0:02
20K
12.43 mi12:00:071:31:537:2423:14
7:29
+0:08
Half
13.11 mi12:05:061:36:527:234:59
7:18
-0:11
25K
15.53 mi12:23:191:55:057:2518:13
7:31
+0:13
30K
18.64 mi12:47:332:19:197:2824:14
7:48
+0:17
20M
20.00 mi12:58:122:29:587:3010:39
7:50
+0:02
21M
21.00 mi13:06:202:38:067:328:08
8:08
+0:18
35K
21.75 mi13:12:012:43:477:325:41
7:36
-0:32
23M
23.00 mi13:21:322:53:187:329:31
7:36
0:00
24M
24.00 mi13:28:593:00:457:327:27
7:27
-0:09
40K
24.85 mi13:35:253:07:117:326:26
7:31
+0:04
25.2M
25.20 mi13:38:153:10:017:322:50
8:13
+0:42
Finish
26.22 mi13:45:243:17:107:327:09
7:01
-1:12

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

7:01 /mi

Average Pace

7:32 /mi

Slowest Pace

8:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:31:19

77% of race

Time at Steady Pace

45:51

23% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:31 /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 mi10:51:1823:047:2523:04
7:25
#11549
10K
6.21 mi11:14:0245:487:2222:44
7:19
#10953
15K
9.32 mi11:36:531:08:397:2222:51
7:21
#10764
20K
12.43 mi12:00:071:31:537:2423:14
7:29
#10697
Half
13.11 mi12:05:061:36:527:234:59
7:18
#10658
25K
15.53 mi12:23:191:55:057:2518:13
7:31
#10525
30K
18.64 mi12:47:332:19:197:2824:14
7:48
#10341
20M
20.00 mi12:58:122:29:587:3010:39
7:50
#10235
21M
21.00 mi13:06:202:38:067:328:08
8:08
#10075
35K
21.75 mi13:12:012:43:477:325:41
7:36
#10007
23M
23.00 mi13:21:322:53:187:329:31
7:36
#9790
24M
24.00 mi13:28:593:00:457:327:27
7:27
#9641
40K
24.85 mi13:35:253:07:117:326:26
7:31
#9504
25.2M
25.20 mi13:38:153:10:017:322:50
8:13
#9447
Finish
26.22 mi13:45:243:17:107:327:09
7:01
#9262
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi115498970897010433(Top 37%)8315(Top 52%)8315(Top 505%)
10K6.21 mi3.10 mi10953+5968640+3308640+33010475(Top 37%)8394(Top 52%)8394(Top 509%)
15K9.32 mi3.11 mi10764+1898527+1138527+11310433(Top 37%)8315(Top 52%)8315(Top 505%)
20K12.43 mi3.11 mi10697+678473+548473+5410551(Top 37%)8282(Top 51%)8282(Top 503%)
Half13.11 mi0.68 mi10658+398457+168457+169971(Top 35%)7993(Top 50%)7993(Top 485%)
25K15.53 mi2.42 mi10525+1338352+1058352+10510068(Top 35%)7911(Top 49%)7911(Top 480%)
30K18.64 mi3.11 mi10341+1848193+1598193+1599921(Top 35%)7643(Top 47%)7643(Top 464%)
20M20.00 mi1.36 mi10235+1068100+938100+939256(Top 33%)7132(Top 44%)7132(Top 433%)
21M21.00 mi1.00 mi10075+1607975+1257975+1258155(Top 29%)6348(Top 39%)6348(Top 385%)
35K21.75 mi0.75 mi10007+687910+657910+659287(Top 33%)6993(Top 43%)6993(Top 424%)
23M23.00 mi1.25 mi9790+2177762+1487762+1487252(Top 26%)5732(Top 36%)5732(Top 348%)
24M24.00 mi1.00 mi9641+1497652+1107652+1107351(Top 26%)5738(Top 36%)5738(Top 348%)
40K24.85 mi0.85 mi9504+1377545+1077545+1076939(Top 24%)5394(Top 33%)5394(Top 327%)
25.2M25.20 mi0.35 mi9447+577492+537492+537146(Top 25%)5436(Top 34%)5436(Top 330%)
Finish26.22 mi1.02 mi9262+1857354+1387354+1385843(Top 21%)4640(Top 29%)4640(Top 282%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21story building
+97ft-345ft

Overall

10433

Males

8315

M55-59

8315

5K→10K

3.1 - 6.2 mi

Top 37%
×5story building
+79ft-138ft

Overall

10475

Males

8394

M55-59

8394

10K→15K

6.2 - 9.3 mi

Top 37%
×3story building
+67ft-78ft

Overall

10433

Males

8315

M55-59

8315

15K→20K

9.3 - 12.4 mi

Top 37%
×5story building
+106ft-86ft

Overall

10551

Males

8282

M55-59

8282

20K→Half

12.4 - 13.1 mi

Top 35%
×2story building
+19ft-37ft

Overall

9971

Males

7993

M55-59

7993

Half→25K

13.1 - 15.5 mi

Top 35%
×4story building
+66ft-88ft

Overall

10068

Males

7911

M55-59

7911

25K→30K

15.5 - 18.6 mi

Top 35%
×9story building
+181ft-148ft

Overall

9921

Males

7643

M55-59

7643

30K→20M

18.6 - 20.0 mi

Top 33%
×5story building
+64ft-50ft

Overall

9256

Males

7132

M55-59

7132

20M→21M

20.0 - 21.0 mi

Top 29%
×8story building
+106ft-24ft

Overall

8155

Males

6348

M55-59

6348

21M→35K

21.0 - 21.8 mi

Top 33%
×7story building
+17ft-86ft

Overall

9287

Males

6993

M55-59

6993

35K→23M

21.8 - 23.0 mi

Top 26%
×5story building
+23ft-63ft

Overall

7252

Males

5732

M55-59

5732

23M→24M

23.0 - 24.0 mi

Top 26%
×6story building
+12ft-82ft

Overall

7351

Males

5738

M55-59

5738

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6939

Males

5394

M55-59

5394

40K→25.2M

24.9 - 25.2 mi

Top 25%
×1story
+13ft-16ft

Overall

7146

Males

5436

M55-59

5436

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2story building
+22ft-21ft

Overall

5843

Males

4640

M55-59

4640

Passing Analysis

Category:
Athletes Passed
2998*
Passed By
709
Net Change
+2287
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11549
5K → 10K67377+596#11549#10953
10K → 15K26475+189#10953#10764
15K → 20K197130+67#10764#10697
20K → Half5718+39#10697#10658
Half → 25K23097+133#10658#10525
25K → 30K311126+184#10525#10341
30K → 20M16458+106#10341#10235
20M → 21M19131+160#10235#10075
21M → 35K10031+68#10075#10007
35K → 23M238*21+217#10007#9790
23M → 24M16011+149#9790#9641
24M → 40K15316+137#9641#9504
40K → 25.2M6710+57#9504#9447
25.2M → Finish1938+185#9447#9262
TOTALS2998*709+2287

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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