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BOSTON MARATHON 2025

Guangjun Feng

Bib: 6626•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 38%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 40%
Division (M50-54)
#0 / 1996
Top 41%
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
7:30/mi
23:18
↑ 97↓ 3451.5%
10K· 6.21 mi
7:20/mi
46:06
↑ 79↓ 1380.4%
15K· 9.32 mi
7:30/mi
1:09:25
↑ 67↓ 78
20K· 12.43 mi
7:39/mi
1:33:11
↑ 106↓ 860.1%
Half· 13.11 mi
7:02/mi
1:37:59
↑ 19↓ 370.5%
25K· 15.53 mi
7:12/mi
1:55:26
↑ 66↓ 880.2%
30K· 18.64 mi
7:35/mi
2:19:01
↑ 181↓ 1480.2%
20M
7:55/mi
2:29:46
↑ 64↓ 500.2%
21M
8:57/mi
2:38:43
↑ 106↓ 241.6%
35K· 21.75 mi
10:42/mi
2:46:43
↑ 17↓ 861.7%
23M
7:42/mi
2:56:21
↑ 23↓ 630.6%
24M
7:49/mi
3:04:10
↓ 821.3%
40K· 24.85 mi
7:38/mi
3:10:42
↓ 200.3%
25.2M
8:59/mi
3:13:48
↑ 13↓ 160.2%
Finish· 26.22 mi
7:53/mi
3:21:50
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:59
Pace7:28 /mi
2nd Half
Distance13.11 mi
Time1:43:51
Pace7:55 /mi
📊Positive Split: 6.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:29:4923:187:3023:18
7:30
-
10K
6.21 mi10:52:3746:067:2522:48
7:20
-0:10
15K
9.32 mi11:15:561:09:257:2723:19
7:30
+0:10
20K
12.43 mi11:39:421:33:117:3023:46
7:39
+0:09
Half
13.11 mi11:44:301:37:597:284:48
7:02
-0:37
25K
15.53 mi12:01:571:55:267:2617:27
7:12
+0:10
30K
18.64 mi12:25:322:19:017:2723:35
7:35
+0:23
20M
20.00 mi12:36:172:29:467:2910:45
7:55
+0:20
21M
21.00 mi12:45:142:38:437:338:57
8:57
+1:02
35K
21.75 mi12:53:142:46:437:408:00
10:42
+1:45
23M
23.00 mi13:02:522:56:217:409:38
7:42
-3:00
24M
24.00 mi13:10:413:04:107:407:49
7:49
+0:07
40K
24.85 mi13:17:133:10:427:406:32
7:38
-0:11
25.2M
25.20 mi13:20:193:13:487:413:06
8:59
+1:21
Finish
26.22 mi13:28:213:21:507:428:02
7:53
-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

7:02 /mi

Average Pace

7:42 /mi

Slowest Pace

10:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

4:48

2% of race

Time at Steady Pace

2:56:59

88% of race

Time at Slower Pace

20:03

10% of race

Average Pace: 7:42 /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 mi10:29:4923:187:3023:18
7:30
#12231
10K
6.21 mi10:52:3746:067:2522:48
7:20
#11399
15K
9.32 mi11:15:561:09:257:2723:19
7:30
#11505
20K
12.43 mi11:39:421:33:117:3023:46
7:39
#11611
Half
13.11 mi11:44:301:37:597:284:48
7:02
#11419
25K
15.53 mi12:01:571:55:267:2617:27
7:12
#10693
30K
18.64 mi12:25:322:19:017:2723:35
7:35
#10221
20M
20.00 mi12:36:172:29:467:2910:45
7:55
#10131
21M
21.00 mi12:45:142:38:437:338:57
8:57
#10303
35K
21.75 mi12:53:142:46:437:408:00
10:42
#11124
23M
23.00 mi13:02:522:56:217:409:38
7:42
#10880
24M
24.00 mi13:10:413:04:107:407:49
7:49
#10801
40K
24.85 mi13:17:133:10:427:406:32
7:38
#10652
25.2M
25.20 mi13:20:193:13:487:413:06
8:59
#10651
Finish
26.22 mi13:28:213:21:507:428:02
7:53
#10669
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi122319274927411788(Top 42%)8962(Top 56%)8962(Top 449%)
10K6.21 mi3.10 mi11399+8328871+4038871+40310641(Top 37%)8481(Top 53%)8481(Top 425%)
15K9.32 mi3.11 mi11505-1068889-188889-1811788(Top 42%)8962(Top 56%)8962(Top 449%)
20K12.43 mi3.11 mi11611-1068908-198908-1911931(Top 42%)8938(Top 55%)8938(Top 448%)
Half13.11 mi0.68 mi11419+1928822+868822+867846(Top 28%)6808(Top 42%)6808(Top 341%)
25K15.53 mi2.42 mi10693+7268438+3848438+3847598(Top 27%)6514(Top 40%)6514(Top 326%)
30K18.64 mi3.11 mi10221+4728129+3098129+3098382(Top 30%)6817(Top 42%)6817(Top 342%)
20M20.00 mi1.36 mi10131+908053+768053+769804(Top 35%)7434(Top 46%)7434(Top 372%)
21M21.00 mi1.00 mi10303-1728084-318084-3113177(Top 46%)8933(Top 55%)8933(Top 448%)
35K21.75 mi0.75 mi11124-8218463-3798463-37923556(Top 83%)13659(Top 85%)13659(Top 684%)
23M23.00 mi1.25 mi10880+2448301+1628301+1627869(Top 28%)6091(Top 38%)6091(Top 305%)
24M24.00 mi1.00 mi10801+798223+788223+789907(Top 35%)7116(Top 44%)7116(Top 357%)
40K24.85 mi0.85 mi10652+1498129+948129+947706(Top 27%)5844(Top 36%)5844(Top 293%)
25.2M25.20 mi0.35 mi10651+18111+188111+1811687(Top 41%)7821(Top 49%)7821(Top 392%)
Finish26.22 mi1.02 mi10669-188084+278084+2712023(Top 42%)8045(Top 50%)8045(Top 403%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21story building
+97ft-345ft

Overall

11788

Males

8962

M50-54

8962

5K→10K

3.1 - 6.2 mi

Top 37%
×5story building
+79ft-138ft

Overall

10641

Males

8481

M50-54

8481

10K→15K

6.2 - 9.3 mi

Top 42%
×3story building
+67ft-78ft

Overall

11788

Males

8962

M50-54

8962

15K→20K

9.3 - 12.4 mi

Top 42%
×5story building
+106ft-86ft

Overall

11931

Males

8938

M50-54

8938

20K→Half

12.4 - 13.1 mi

Top 28%
×2story building
+19ft-37ft

Overall

7846

Males

6808

M50-54

6808

Half→25K

13.1 - 15.5 mi

Top 27%
×4story building
+66ft-88ft

Overall

7598

Males

6514

M50-54

6514

25K→30K

15.5 - 18.6 mi

Top 30%
×9story building
+181ft-148ft

Overall

8382

Males

6817

M50-54

6817

30K→20M

18.6 - 20.0 mi

Top 35%
×5story building
+64ft-50ft

Overall

9804

Males

7434

M50-54

7434

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

13177

Males

8933

M50-54

8933

21M→35K

21.0 - 21.8 mi

Top 83%
×7story building
+17ft-86ft

Overall

23556

Males

13659

M50-54

13659

35K→23M

21.8 - 23.0 mi

Top 28%
×5story building
+23ft-63ft

Overall

7869

Males

6091

M50-54

6091

23M→24M

23.0 - 24.0 mi

Top 35%
×6story building
+12ft-82ft

Overall

9907

Males

7116

M50-54

7116

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7706

Males

5844

M50-54

5844

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

11687

Males

7821

M50-54

7821

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2story building
+22ft-21ft

Overall

12023

Males

8045

M50-54

8045

Passing Analysis

Category:
Athletes Passed
3429
Passed By
1866
Net Change
+1562
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12231
5K → 10K87341+832#12231#11399
10K → 15K140246-106#11399#11505
15K → 20K144250-106#11505#11611
20K → Half1931+192#11611#11419
Half → 25K7260+726#11419#10693
25K → 30K49624+472#10693#10221
30K → 20M15565+90#10221#10131
20M → 21M57228-172#10131#10303
21M → 35K1822-821#10303#11124
35K → 23M26016+244#11124#10880
23M → 24M11536+79#10880#10801
24M → 40K1589+149#10801#10652
40K → 25.2M4443+1#10652#10651
25.2M → Finish6785-18#10651#10669
TOTALS34291866+1562
📊

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