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BOSTON MARATHON 2025

Edwin Lahm

Bib: 10639•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 30%
Gender (Male)
#0 / 16105
Top 44%
Masters (Masters Men)
#0 / 10463
Top 32%
Division (M55-59)
#0 / 1648
Top 13%
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
6:37/mi
20:34
↑ 97↓ 3451.5%
10K· 6.21 mi
6:36/mi
41:04
↑ 79↓ 1380.4%
15K· 9.32 mi
6:42/mi
1:01:53
↑ 67↓ 78
20K· 12.43 mi
6:55/mi
1:23:21
↑ 106↓ 860.1%
Half· 13.11 mi
6:50/mi
1:28:01
↑ 19↓ 370.5%
25K· 15.53 mi
7:11/mi
1:45:27
↑ 66↓ 880.2%
30K· 18.64 mi
7:44/mi
2:09:30
↑ 181↓ 1480.2%
20M
8:15/mi
2:20:43
↑ 64↓ 500.2%
21M
9:08/mi
2:29:51
↑ 106↓ 241.6%
35K· 21.75 mi
8:12/mi
2:35:59
↑ 17↓ 861.7%
23M
8:37/mi
2:46:46
↑ 23↓ 630.6%
24M
8:41/mi
2:55:27
↓ 821.3%
40K· 24.85 mi
8:56/mi
3:03:05
↓ 200.3%
25.2M
9:54/mi
3:06:30
↑ 13↓ 160.2%
Finish· 26.22 mi
8:40/mi
3:15:20
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:01
Pace6:43 /mi
2nd Half
Distance13.11 mi
Time1:47:19
Pace8:11 /mi
📊Positive Split: 21.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:3220:346:3720:34
6:37
-
10K
6.21 mi11:07:0241:046:3720:30
6:36
-0:01
15K
9.32 mi11:27:511:01:536:3820:49
6:42
+0:06
20K
12.43 mi11:49:191:23:216:4221:28
6:55
+0:13
Half
13.11 mi11:53:591:28:016:434:40
6:50
-0:05
25K
15.53 mi12:11:251:45:276:4717:26
7:11
+0:21
30K
18.64 mi12:35:282:09:306:5724:03
7:44
+0:33
20M
20.00 mi12:46:412:20:437:0211:13
8:15
+0:31
21M
21.00 mi12:55:492:29:517:089:08
9:08
+0:53
35K
21.75 mi13:01:572:35:597:106:08
8:12
-0:56
23M
23.00 mi13:12:442:46:467:1510:47
8:37
+0:25
24M
24.00 mi13:21:252:55:277:198:41
8:41
+0:04
40K
24.85 mi13:29:033:03:057:227:38
8:56
+0:15
25.2M
25.20 mi13:32:283:06:307:243:25
9:54
+0:58
Finish
26.22 mi13:41:183:15:207:278:50
8:40
-1:14

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

6:36 /mi

Average Pace

7:27 /mi

Slowest Pace

9:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:45:27

54% of race

Time at Steady Pace

1:09:42

36% of race

Time at Slower Pace

20:11

10% of race

Average Pace: 7:27 /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 mi10:46:3220:346:3720:34
6:37
#4777
10K
6.21 mi11:07:0241:046:3720:30
6:36
#4576
15K
9.32 mi11:27:511:01:536:3820:49
6:42
#4710
20K
12.43 mi11:49:191:23:216:4221:28
6:55
#5064
Half
13.11 mi11:53:591:28:016:434:40
6:50
#5123
25K
15.53 mi12:11:251:45:276:4717:26
7:11
#5615
30K
18.64 mi12:35:282:09:306:5724:03
7:44
#6303
20M
20.00 mi12:46:412:20:437:0211:13
8:15
#6616
21M
21.00 mi12:55:492:29:517:089:08
9:08
#6960
35K
21.75 mi13:01:572:35:597:106:08
8:12
#7132
23M
23.00 mi13:12:442:46:467:1510:47
8:37
#7464
24M
24.00 mi13:21:252:55:277:198:41
8:41
#7797
40K
24.85 mi13:29:033:03:057:227:38
8:56
#8116
25.2M
25.20 mi13:32:283:06:307:243:25
9:54
#8247
Finish
26.22 mi13:41:183:15:207:278:50
8:40
#8659
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi4777447844785092(Top 18%)4727(Top 29%)4727(Top 287%)
10K6.21 mi3.10 mi4576+2014295+1834295+1834474(Top 16%)4193(Top 26%)4193(Top 254%)
15K9.32 mi3.11 mi4710-1344409-1144409-1145092(Top 18%)4727(Top 29%)4727(Top 287%)
20K12.43 mi3.11 mi5064-3544711-3024711-3026282(Top 22%)5654(Top 35%)5654(Top 343%)
Half13.11 mi0.68 mi5123-594755-444755-446511(Top 23%)5851(Top 36%)5851(Top 355%)
25K15.53 mi2.42 mi5615-4925158-4035158-4037538(Top 27%)6468(Top 40%)6468(Top 392%)
30K18.64 mi3.11 mi6303-6885674-5165674-5169474(Top 33%)7412(Top 46%)7412(Top 450%)
20M20.00 mi1.36 mi6616-3135897-2235897-22312131(Top 43%)8573(Top 53%)8573(Top 520%)
21M21.00 mi1.00 mi6960-3446128-2316128-23114232(Top 50%)9435(Top 59%)9435(Top 573%)
35K21.75 mi0.75 mi7132-1726224-966224-9613550(Top 48%)9043(Top 56%)9043(Top 549%)
23M23.00 mi1.25 mi7464-3326401-1776401-17713968(Top 49%)9141(Top 57%)9141(Top 555%)
24M24.00 mi1.00 mi7797-3336578-1776578-17715600(Top 55%)9859(Top 61%)9859(Top 598%)
40K24.85 mi0.85 mi8116-3196748-1706748-17015862(Top 56%)9838(Top 61%)9838(Top 597%)
25.2M25.20 mi0.35 mi8247-1316814-666814-6616515(Top 58%)10108(Top 63%)10108(Top 613%)
Finish26.22 mi1.02 mi8659-4127026-2127026-21217230(Top 61%)10498(Top 65%)10498(Top 637%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21story building
+97ft-345ft

Overall

5092

Males

4727

M55-59

4727

5K→10K

3.1 - 6.2 mi

Top 16%
×5story building
+79ft-138ft

Overall

4474

Males

4193

M55-59

4193

10K→15K

6.2 - 9.3 mi

Top 18%
×3story building
+67ft-78ft

Overall

5092

Males

4727

M55-59

4727

15K→20K

9.3 - 12.4 mi

Top 22%
×5story building
+106ft-86ft

Overall

6282

Males

5654

M55-59

5654

20K→Half

12.4 - 13.1 mi

Top 23%
×2story building
+19ft-37ft

Overall

6511

Males

5851

M55-59

5851

Half→25K

13.1 - 15.5 mi

Top 27%
×4story building
+66ft-88ft

Overall

7538

Males

6468

M55-59

6468

25K→30K

15.5 - 18.6 mi

Top 33%
×9story building
+181ft-148ft

Overall

9474

Males

7412

M55-59

7412

30K→20M

18.6 - 20.0 mi

Top 43%
×5story building
+64ft-50ft

Overall

12131

Males

8573

M55-59

8573

20M→21M

20.0 - 21.0 mi

Top 50%
×8story building
+106ft-24ft

Overall

14232

Males

9435

M55-59

9435

21M→35K

21.0 - 21.8 mi

Top 48%
×7story building
+17ft-86ft

Overall

13550

Males

9043

M55-59

9043

35K→23M

21.8 - 23.0 mi

Top 49%
×5story building
+23ft-63ft

Overall

13968

Males

9141

M55-59

9141

23M→24M

23.0 - 24.0 mi

Top 55%
×6story building
+12ft-82ft

Overall

15600

Males

9859

M55-59

9859

24M→40K

24.0 - 24.9 mi

Top 56%
×1story
+6ft-20ft

Overall

15862

Males

9838

M55-59

9838

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

16515

Males

10108

M55-59

10108

25.2M→Finish

25.2 - 26.2 mi

Top 61%
×2story building
+22ft-21ft

Overall

17230

Males

10498

M55-59

10498

Passing Analysis

Category:
Athletes Passed
643
Passed By
4525
Net Change
-3882
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4777
5K → 10K28281+201#4777#4576
10K → 15K70204-134#4576#4710
15K → 20K47401-354#4710#5064
20K → Half1069-59#5064#5123
Half → 25K30522-492#5123#5615
25K → 30K50738-688#5615#6303
30K → 20M40353-313#6303#6616
20M → 21M13357-344#6616#6960
21M → 35K19191-172#6960#7132
35K → 23M28360-332#7132#7464
23M → 24M17350-333#7464#7797
24M → 40K22341-319#7797#8116
40K → 25.2M7138-131#8116#8247
25.2M → Finish8420-412#8247#8659
TOTALS6434525-3882
📊

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