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BOSTON MARATHON 2025

James Irlam

Bib: 3596•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 11%
Gender (Male)
#0 / 16105
Top 18%
Division (M18-39)
#0 / 5642
Top 40%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:37
Rank: #2512
Start → 5K
19:37 | 6:19/mi
10K· 6.21 mi
39:14
Rank: #2515 (-3)
5K → 10K
19:37 | 6:19/mi
15K· 9.32 mi
58:49
Rank: #2454 (+61)
10K → 15K
19:35 | 6:18/mi
20K· 12.43 mi
1:18:55
Rank: #2549 (-95)
15K → 20K
20:06 | 6:28/mi
Half· 13.11 mi
1:23:20
Rank: #2600 (-51)
20K → Half
4:25 | 6:28/mi
25K· 15.53 mi
1:39:22
Rank: #2722 (-122)
Half → 25K
16:02 | 6:37/mi
30K· 18.64 mi
2:00:33
Rank: #2830 (-108)
25K → 30K
21:11 | 6:49/mi
20M
2:10:12
Rank: #2936 (-106)
30K → 20M
9:39 | 7:06/mi
21M
2:17:49
Rank: #3016 (-80)
20M → 21M
7:37 | 7:37/mi
35K· 21.75 mi
2:22:56
Rank: #3028 (-12)
21M → 35K
5:07 | 6:50/mi
23M
2:31:46
Rank: #3033 (-5)
35K → 23M
8:50 | 7:03/mi
24M
2:38:39
Rank: #3040 (-7)
23M → 24M
6:53 | 6:53/mi
40K· 24.85 mi
2:44:46
Rank: #3062 (-22)
24M → 40K
6:07 | 7:09/mi
25.2M
2:47:26
Rank: #3059 (+3)
40K → 25.2M
2:40 | 7:44/mi
Finish· 26.22 mi
2:54:23
Rank: #3085 (-26)
25.2M → Finish
6:57 | 6:49/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:23:20
Pace6:21 /mi
2nd Half
Distance13.11 mi
Time1:31:03
Pace6:57 /mi
📊Positive Split: 9.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:3619:376:1919:37
6:19
-
10K
6.21 mi10:41:1339:146:1919:37
6:19
0:00
15K
9.32 mi11:00:4858:496:1919:35
6:18
-0:01
20K
12.43 mi11:20:541:18:556:2120:06
6:28
+0:10
Half
13.11 mi11:25:191:23:206:214:25
6:28
0:00
25K
15.53 mi11:41:211:39:226:2416:02
6:37
+0:09
30K
18.64 mi12:02:322:00:336:2821:11
6:49
+0:12
20M
20.00 mi12:12:112:10:126:319:39
7:06
+0:17
21M
21.00 mi12:19:482:17:496:347:37
7:37
+0:31
35K
21.75 mi12:24:552:22:566:345:07
6:50
-0:47
23M
23.00 mi12:33:452:31:466:368:50
7:03
+0:13
24M
24.00 mi12:40:382:38:396:376:53
6:53
-0:10
40K
24.85 mi12:46:452:44:466:386:07
7:09
+0:16
25.2M
25.20 mi12:49:252:47:266:392:40
7:44
+0:35
Finish
26.22 mi12:56:222:54:236:396:57
6:49
-0:55

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

6:18 /mi

Average Pace

6:39 /mi

Slowest Pace

7:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:23:20

48% of race

Time at Steady Pace

56:10

32% of race

Time at Slower Pace

34:53

20% of race

Average Pace: 6:39 /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 mi10:21:3619:376:1919:37
6:19
#2512
10K
6.21 mi10:41:1339:146:1919:37
6:19
#2515
15K
9.32 mi11:00:4858:496:1919:35
6:18
#2454
20K
12.43 mi11:20:541:18:556:2120:06
6:28
#2549
Half
13.11 mi11:25:191:23:206:214:25
6:28
#2600
25K
15.53 mi11:41:211:39:226:2416:02
6:37
#2722
30K
18.64 mi12:02:322:00:336:2821:11
6:49
#2830
20M
20.00 mi12:12:112:10:126:319:39
7:06
#2936
21M
21.00 mi12:19:482:17:496:347:37
7:37
#3016
35K
21.75 mi12:24:552:22:566:345:07
6:50
#3028
23M
23.00 mi12:33:452:31:466:368:50
7:03
#3033
24M
24.00 mi12:40:382:38:396:376:53
6:53
#3040
40K
24.85 mi12:46:452:44:466:386:07
7:09
#3062
25.2M
25.20 mi12:49:252:47:266:392:40
7:44
#3059
Finish
26.22 mi12:56:222:54:236:396:57
6:49
#3085
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2512239323932345(Top 8%)2237(Top 14%)2237(Top 40%)
10K6.21 mi3.10 mi2515-32395-22395-22495(Top 9%)2385(Top 15%)2385(Top 42%)
15K9.32 mi3.11 mi2454+612342+532342+532345(Top 8%)2237(Top 14%)2237(Top 40%)
20K12.43 mi3.11 mi2549-952432-902432-902933(Top 10%)2793(Top 17%)2793(Top 50%)
Half13.11 mi0.68 mi2600-512483-512483-513469(Top 12%)3285(Top 20%)3285(Top 58%)
25K15.53 mi2.42 mi2722-1222597-1142597-1143530(Top 12%)3327(Top 21%)3327(Top 59%)
30K18.64 mi3.11 mi2830-1082695-982695-983548(Top 12%)3293(Top 20%)3293(Top 58%)
20M20.00 mi1.36 mi2936-1062793-982793-984649(Top 16%)4208(Top 26%)4208(Top 75%)
21M21.00 mi1.00 mi3016-802860-672860-675174(Top 18%)4495(Top 28%)4495(Top 80%)
35K21.75 mi0.75 mi3028-122867-72867-74287(Top 15%)3816(Top 24%)3816(Top 68%)
23M23.00 mi1.25 mi3033-52870-32870-34048(Top 14%)3607(Top 22%)3607(Top 64%)
24M24.00 mi1.00 mi3040-72873-32873-33954(Top 14%)3493(Top 22%)3493(Top 62%)
40K24.85 mi0.85 mi3062-222889-162889-164740(Top 17%)4018(Top 25%)4018(Top 71%)
25.2M25.20 mi0.35 mi3059+32885+42885+44419(Top 16%)3697(Top 23%)3697(Top 66%)
Finish26.22 mi1.02 mi3085-262906-212906-214593(Top 16%)3843(Top 24%)3843(Top 68%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 8%
×21stories
+97ft-345ft

Overall

2345

Males

2237

M18-39

2237

5K→10K

3.1 - 6.2 mi

Top 9%
×5stories
+79ft-138ft

Overall

2495

Males

2385

M18-39

2385

10K→15K

6.2 - 9.3 mi

Top 8%
×3stories
+67ft-78ft

Overall

2345

Males

2237

M18-39

2237

15K→20K

9.3 - 12.4 mi

Top 10%
×5stories
+106ft-86ft

Overall

2933

Males

2793

M18-39

2793

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3469

Males

3285

M18-39

3285

Half→25K

13.1 - 15.5 mi

Top 12%
×4stories
+66ft-88ft

Overall

3530

Males

3327

M18-39

3327

25K→30K

15.5 - 18.6 mi

Top 12%
×9stories
+181ft-148ft

Overall

3548

Males

3293

M18-39

3293

30K→20M

18.6 - 20.0 mi

Top 16%
×5stories
+64ft-50ft

Overall

4649

Males

4208

M18-39

4208

20M→21M

20.0 - 21.0 mi

Top 18%
×8stories
+106ft-24ft

Overall

5174

Males

4495

M18-39

4495

21M→35K

21.0 - 21.8 mi

Top 15%
×7stories
+17ft-86ft

Overall

4287

Males

3816

M18-39

3816

35K→23M

21.8 - 23.0 mi

Top 14%
×5stories
+23ft-63ft

Overall

4048

Males

3607

M18-39

3607

23M→24M

23.0 - 24.0 mi

Top 14%
×6stories
+12ft-82ft

Overall

3954

Males

3493

M18-39

3493

24M→40K

24.0 - 24.9 mi

Top 17%
×1story
+6ft-20ft

Overall

4740

Males

4018

M18-39

4018

40K→25.2M

24.9 - 25.2 mi

Top 16%
×1story
+13ft-16ft

Overall

4419

Males

3697

M18-39

3697

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2stories
+22ft-21ft

Overall

4593

Males

3843

M18-39

3843

Passing Analysis

Category:
Athletes Passed
647
Passed By
1220
Net Change
-573
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2512
5K → 10K110113-3#2512#2515
10K → 15K11958+61#2515#2454
15K → 20K44139-95#2454#2549
20K → Half354-51#2549#2600
Half → 25K34156-122#2600#2722
25K → 30K73181-108#2722#2830
30K → 20M33139-106#2830#2936
20M → 21M20100-80#2936#3016
21M → 35K2638-12#3016#3028
35K → 23M6570-5#3028#3033
23M → 24M3542-7#3033#3040
24M → 40K3355-22#3040#3062
40K → 25.2M2017+3#3062#3059
25.2M → Finish3258-26#3059#3085
TOTALS6471220-573
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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