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BOSTON MARATHON 2025

Juan Carlo Igos

Bib: 7581•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 41%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 44%
Division (M40-44)
#0 / 2247
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
6:48/mi
21:09
↑ 97↓ 3451.5%
10K· 6.21 mi
6:48/mi
42:18
↑ 79↓ 1380.4%
15K· 9.32 mi
6:49/mi
1:03:28
↑ 67↓ 78
20K· 12.43 mi
6:48/mi
1:24:37
↑ 106↓ 860.1%
Half· 13.11 mi
6:42/mi
1:29:11
↑ 19↓ 370.5%
25K· 15.53 mi
6:53/mi
1:45:52
↑ 66↓ 880.2%
30K· 18.64 mi
8:00/mi
2:10:42
↑ 181↓ 1480.2%
20M
9:48/mi
2:24:01
↑ 64↓ 500.2%
21M
10:48/mi
2:34:49
↑ 106↓ 241.6%
35K· 21.75 mi
9:19/mi
2:41:47
↑ 17↓ 861.7%
23M
9:17/mi
2:53:24
↑ 23↓ 630.6%
24M
9:06/mi
3:02:30
↓ 821.3%
40K· 24.85 mi
9:23/mi
3:10:31
↓ 200.3%
25.2M
11:16/mi
3:14:24
↑ 13↓ 160.2%
Finish· 26.22 mi
10:38/mi
3:25:14
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:11
Pace6:48 /mi
2nd Half
Distance13.11 mi
Time1:56:03
Pace8:51 /mi
📊Positive Split: 30.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:28:0321:096:4821:09
6:48
-
10K
6.21 mi10:49:1242:186:4821:09
6:48
0:00
15K
9.32 mi11:10:221:03:286:4921:10
6:49
+0:01
20K
12.43 mi11:31:311:24:376:4921:09
6:48
-0:01
Half
13.11 mi11:36:051:29:116:484:34
6:42
-0:06
25K
15.53 mi11:52:461:45:526:4916:41
6:53
+0:11
30K
18.64 mi12:17:362:10:427:0124:50
8:00
+1:07
20M
20.00 mi12:30:552:24:017:1213:19
9:48
+1:48
21M
21.00 mi12:41:432:34:497:2210:48
10:48
+1:00
35K
21.75 mi12:48:412:41:477:266:58
9:19
-1:29
23M
23.00 mi13:00:182:53:247:3211:37
9:17
-0:02
24M
24.00 mi13:09:243:02:307:369:06
9:06
-0:11
40K
24.85 mi13:17:253:10:317:408:01
9:23
+0:17
25.2M
25.20 mi13:21:183:14:247:433:53
11:16
+1:53
Finish
26.22 mi13:32:083:25:147:5010:50
10:38
-0:38

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

6:42 /mi

Average Pace

7:50 /mi

Slowest Pace

11:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:10:42

64% of race

Time at Steady Pace

49:01

24% of race

Time at Slower Pace

25:31

12% of race

Average Pace: 7:50 /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 mi10:28:0321:096:4821:09
6:48
#6371
10K
6.21 mi10:49:1242:186:4821:09
6:48
#6385
15K
9.32 mi11:10:221:03:286:4921:10
6:49
#6294
20K
12.43 mi11:31:311:24:376:4921:09
6:48
#6019
Half
13.11 mi11:36:051:29:116:484:34
6:42
#5980
25K
15.53 mi11:52:461:45:526:4916:41
6:53
#5853
30K
18.64 mi12:17:362:10:427:0124:50
8:00
#6744
20M
20.00 mi12:30:552:24:017:1213:19
9:48
#7749
21M
21.00 mi12:41:432:34:497:2210:48
10:48
#8741
35K
21.75 mi12:48:412:41:477:266:58
9:19
#9229
23M
23.00 mi13:00:182:53:247:3211:37
9:17
#9833
24M
24.00 mi13:09:243:02:307:369:06
9:06
#10257
40K
24.85 mi13:17:253:10:317:408:01
9:23
#10599
25.2M
25.20 mi13:21:183:14:247:433:53
11:16
#10846
Finish
26.22 mi13:32:083:25:147:5010:50
10:38
#11757
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi6371581758176218(Top 22%)5639(Top 35%)5639(Top 251%)
10K6.21 mi3.10 mi6385-145831-145831-146477(Top 23%)5865(Top 36%)5865(Top 261%)
15K9.32 mi3.11 mi6294+915743+885743+886218(Top 22%)5639(Top 35%)5639(Top 251%)
20K12.43 mi3.11 mi6019+2755499+2445499+2445386(Top 19%)4942(Top 31%)4942(Top 220%)
Half13.11 mi0.68 mi5980+395466+335466+335282(Top 19%)4877(Top 30%)4877(Top 217%)
25K15.53 mi2.42 mi5853+1275343+1235343+1235523(Top 19%)5013(Top 31%)5013(Top 223%)
30K18.64 mi3.11 mi6744-8916016-6736016-67311318(Top 40%)8350(Top 52%)8350(Top 372%)
20M20.00 mi1.36 mi7749-10056688-6726688-67220281(Top 71%)12268(Top 76%)12268(Top 546%)
21M21.00 mi1.00 mi8741-9927256-5687256-56820820(Top 73%)12402(Top 77%)12402(Top 552%)
35K21.75 mi0.75 mi9229-4887499-2437499-24319589(Top 69%)11766(Top 73%)11766(Top 524%)
23M23.00 mi1.25 mi9833-6047783-2847783-28417661(Top 62%)10790(Top 67%)10790(Top 480%)
24M24.00 mi1.00 mi10257-4247963-1807963-18017840(Top 63%)10843(Top 67%)10843(Top 483%)
40K24.85 mi0.85 mi10599-3428103-1408103-14018152(Top 64%)10897(Top 68%)10897(Top 485%)
25.2M25.20 mi0.35 mi10846-2478191-888191-8821356(Top 75%)12445(Top 77%)12445(Top 554%)
Finish26.22 mi1.02 mi11757-9118593-4028593-40224564(Top 86%)14060(Top 87%)14060(Top 626%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 22%
×21story building
+97ft-345ft

Overall

6218

Males

5639

M40-44

5639

5K→10K

3.1 - 6.2 mi

Top 23%
×5story building
+79ft-138ft

Overall

6477

Males

5865

M40-44

5865

10K→15K

6.2 - 9.3 mi

Top 22%
×3story building
+67ft-78ft

Overall

6218

Males

5639

M40-44

5639

15K→20K

9.3 - 12.4 mi

Top 19%
×5story building
+106ft-86ft

Overall

5386

Males

4942

M40-44

4942

20K→Half

12.4 - 13.1 mi

Top 19%
×2story building
+19ft-37ft

Overall

5282

Males

4877

M40-44

4877

Half→25K

13.1 - 15.5 mi

Top 19%
×4story building
+66ft-88ft

Overall

5523

Males

5013

M40-44

5013

25K→30K

15.5 - 18.6 mi

Top 40%
×9story building
+181ft-148ft

Overall

11318

Males

8350

M40-44

8350

30K→20M

18.6 - 20.0 mi

Top 71%
×5story building
+64ft-50ft

Overall

20281

Males

12268

M40-44

12268

20M→21M

20.0 - 21.0 mi

Top 73%
×8story building
+106ft-24ft

Overall

20820

Males

12402

M40-44

12402

21M→35K

21.0 - 21.8 mi

Top 69%
×7story building
+17ft-86ft

Overall

19589

Males

11766

M40-44

11766

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

17661

Males

10790

M40-44

10790

23M→24M

23.0 - 24.0 mi

Top 63%
×6story building
+12ft-82ft

Overall

17840

Males

10843

M40-44

10843

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

18152

Males

10897

M40-44

10897

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

21356

Males

12445

M40-44

12445

25.2M→Finish

25.2 - 26.2 mi

Top 86%
×2story building
+22ft-21ft

Overall

24564

Males

14060

M40-44

14060

Passing Analysis

Category:
Athletes Passed
1045
Passed By
6429
Net Change
-5386
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6371
5K → 10K183197-14#6371#6385
10K → 15K198107+91#6385#6294
15K → 20K30025+275#6294#6019
20K → Half434+39#6019#5980
Half → 25K19265+127#5980#5853
25K → 30K39930-891#5853#6744
30K → 20M81013-1005#6744#7749
20M → 21M6998-992#7749#8741
21M → 35K7495-488#8741#9229
35K → 23M17621-604#9229#9833
23M → 24M22444-424#9833#10257
24M → 40K18360-342#10257#10599
40K → 25.2M8255-247#10599#10846
25.2M → Finish4915-911#10846#11757
TOTALS10456429-5386
📊

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