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BOSTON MARATHON 2025

Giang Lam

Bib: 11836•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 29%
Gender (Male)
#0 / 16105
Top 43%
Masters (Masters Men)
#0 / 10463
Top 30%
Division (M50-54)
#0 / 1996
Top 28%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:42
Rank: #5132
Start → 5K
6:40/mi
20:42 split
10K· 6.21 mi
41:52
Rank: #5731 (-599)
5K → 10K
6:49/mi
21:10 split
15K· 9.32 mi
1:03:10
Rank: #5974 (-243)
10K → 15K
6:51/mi
21:18 split
20K· 12.43 mi
1:24:43
Rank: #6092 (-118)
15K → 20K
6:56/mi
21:33 split
Half· 13.11 mi
1:29:22
Rank: #6100 (-8)
20K → Half
6:49/mi
4:39 split
25K· 15.53 mi
1:46:26
Rank: #6177 (-77)
Half → 25K
7:02/mi
17:04 split
30K· 18.64 mi
2:09:11
Rank: #6186 (-9)
25K → 30K
7:19/mi
22:45 split
20M
2:19:42
Rank: #6290 (-104)
30K → 20M
7:44/mi
10:31 split
21M
2:28:18
Rank: #6454 (-164)
20M → 21M
8:36/mi
8:36 split
35K· 21.75 mi
2:34:11
Rank: #6562 (-108)
21M → 35K
7:52/mi
5:53 split
23M
2:44:47
Rank: #6864 (-302)
35K → 23M
8:28/mi
10:36 split
24M
2:53:26
Rank: #7180 (-316)
23M → 24M
8:39/mi
8:39 split
40K· 24.85 mi
3:01:20
Rank: #7557 (-377)
24M → 40K
9:14/mi
7:54 split
25.2M
3:04:58
Rank: #7762 (-205)
40K → 25.2M
10:32/mi
3:38 split
Finish· 26.22 mi
3:14:21
Rank: #8357 (-595)
25.2M → Finish
9:12/mi
9:23 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:22
Pace6:49 /mi
2nd Half
Distance13.11 mi
Time1:44:59
Pace8:01 /mi
📊Positive Split: 17.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:5120:426:4020:42
6:40
-
10K
6.21 mi11:10:0141:526:4421:10
6:49
+0:09
15K
9.32 mi11:31:191:03:106:4721:18
6:51
+0:02
20K
12.43 mi11:52:521:24:436:4921:33
6:56
+0:05
Half
13.11 mi11:57:311:29:226:494:39
6:49
-0:07
25K
15.53 mi12:14:351:46:266:5117:04
7:02
+0:13
30K
18.64 mi12:37:202:09:116:5622:45
7:19
+0:17
20M
20.00 mi12:47:512:19:426:5910:31
7:44
+0:25
21M
21.00 mi12:56:272:28:187:048:36
8:36
+0:52
35K
21.75 mi13:02:202:34:117:055:53
7:52
-0:44
23M
23.00 mi13:12:562:44:477:1010:36
8:28
+0:36
24M
24.00 mi13:21:352:53:267:148:39
8:39
+0:11
40K
24.85 mi13:29:293:01:207:187:54
9:14
+0:35
25.2M
25.20 mi13:33:073:04:587:203:38
10:32
+1:18
Finish
26.22 mi13:42:303:14:217:259:23
9:12
-1:20

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

6:40 /mi

Average Pace

7:25 /mi

Slowest Pace

10:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:26

55% of race

Time at Steady Pace

39:09

20% of race

Time at Slower Pace

48:46

25% of race

Average Pace: 7:25 /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 mi10:48:5120:426:4020:42
6:40
#5132
10K
6.21 mi11:10:0141:526:4421:10
6:49
#5731
15K
9.32 mi11:31:191:03:106:4721:18
6:51
#5974
20K
12.43 mi11:52:521:24:436:4921:33
6:56
#6092
Half
13.11 mi11:57:311:29:226:494:39
6:49
#6100
25K
15.53 mi12:14:351:46:266:5117:04
7:02
#6177
30K
18.64 mi12:37:202:09:116:5622:45
7:19
#6186
20M
20.00 mi12:47:512:19:426:5910:31
7:44
#6290
21M
21.00 mi12:56:272:28:187:048:36
8:36
#6454
35K
21.75 mi13:02:202:34:117:055:53
7:52
#6562
23M
23.00 mi13:12:562:44:477:1010:36
8:28
#6864
24M
24.00 mi13:21:352:53:267:148:39
8:39
#7180
40K
24.85 mi13:29:293:01:207:187:54
9:14
#7557
25.2M
25.20 mi13:33:073:04:587:203:38
10:32
#7762
Finish
26.22 mi13:42:303:14:217:259:23
9:12
#8357
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi5132478847886649(Top 23%)5987(Top 37%)5987(Top 300%)
10K6.21 mi3.10 mi5731-5995289-5015289-5016536(Top 23%)5913(Top 37%)5913(Top 296%)
15K9.32 mi3.11 mi5974-2435477-1885477-1886649(Top 23%)5987(Top 37%)5987(Top 300%)
20K12.43 mi3.11 mi6092-1185561-845561-846481(Top 23%)5812(Top 36%)5812(Top 291%)
Half13.11 mi0.68 mi6100-85560+15560+16319(Top 22%)5704(Top 35%)5704(Top 286%)
25K15.53 mi2.42 mi6177-775598-385598-386577(Top 23%)5822(Top 36%)5822(Top 292%)
30K18.64 mi3.11 mi6186-95579+195579+196581(Top 23%)5702(Top 35%)5702(Top 286%)
20M20.00 mi1.36 mi6290-1045652-735652-738610(Top 30%)6789(Top 42%)6789(Top 340%)
21M21.00 mi1.00 mi6454-1645759-1075759-10711058(Top 39%)7891(Top 49%)7891(Top 395%)
35K21.75 mi0.75 mi6562-1085815-565815-5611232(Top 40%)7959(Top 49%)7959(Top 399%)
23M23.00 mi1.25 mi6864-3026004-1896004-18913064(Top 46%)8715(Top 54%)8715(Top 437%)
24M24.00 mi1.00 mi7180-3166183-1796183-17915406(Top 54%)9757(Top 61%)9757(Top 489%)
40K24.85 mi0.85 mi7557-3776389-2066389-20617501(Top 62%)10589(Top 66%)10589(Top 531%)
25.2M25.20 mi0.35 mi7762-2056507-1186507-11819063(Top 67%)11321(Top 70%)11321(Top 567%)
Finish26.22 mi1.02 mi8357-5956845-3386845-33819949(Top 70%)11770(Top 73%)11770(Top 590%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 23%
×21story building
+97ft-345ft

Overall

6649

Males

5987

M50-54

5987

5K→10K

3.1 - 6.2 mi

Top 23%
×5story building
+79ft-138ft

Overall

6536

Males

5913

M50-54

5913

10K→15K

6.2 - 9.3 mi

Top 23%
×3story building
+67ft-78ft

Overall

6649

Males

5987

M50-54

5987

15K→20K

9.3 - 12.4 mi

Top 23%
×5story building
+106ft-86ft

Overall

6481

Males

5812

M50-54

5812

20K→Half

12.4 - 13.1 mi

Top 22%
×2story building
+19ft-37ft

Overall

6319

Males

5704

M50-54

5704

Half→25K

13.1 - 15.5 mi

Top 23%
×4story building
+66ft-88ft

Overall

6577

Males

5822

M50-54

5822

25K→30K

15.5 - 18.6 mi

Top 23%
×9story building
+181ft-148ft

Overall

6581

Males

5702

M50-54

5702

30K→20M

18.6 - 20.0 mi

Top 30%
×5story building
+64ft-50ft

Overall

8610

Males

6789

M50-54

6789

20M→21M

20.0 - 21.0 mi

Top 39%
×8story building
+106ft-24ft

Overall

11058

Males

7891

M50-54

7891

21M→35K

21.0 - 21.8 mi

Top 40%
×7story building
+17ft-86ft

Overall

11232

Males

7959

M50-54

7959

35K→23M

21.8 - 23.0 mi

Top 46%
×5story building
+23ft-63ft

Overall

13064

Males

8715

M50-54

8715

23M→24M

23.0 - 24.0 mi

Top 54%
×6story building
+12ft-82ft

Overall

15406

Males

9757

M50-54

9757

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

17501

Males

10589

M50-54

10589

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1story
+13ft-16ft

Overall

19063

Males

11321

M50-54

11321

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2story building
+22ft-21ft

Overall

19949

Males

11770

M50-54

11770

Passing Analysis

Category:
Athletes Passed
697
Passed By
3922
Net Change
-3225
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5132
5K → 10K36635-599#5132#5731
10K → 15K68311-243#5731#5974
15K → 20K117235-118#5974#6092
20K → Half1725-8#6092#6100
Half → 25K106183-77#6100#6177
25K → 30K170179-9#6177#6186
30K → 20M55159-104#6186#6290
20M → 21M27191-164#6290#6454
21M → 35K24132-108#6454#6562
35K → 23M32334-302#6562#6864
23M → 24M18334-316#6864#7180
24M → 40K14391-377#7180#7557
40K → 25.2M7212-205#7557#7762
25.2M → Finish6601-595#7762#8357
TOTALS6973922-3225
📊

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