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BOSTON MARATHON 2025

Nathaniel Fierstos

Bib: 7592•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 7%
Gender (Male)
#0 / 16105
Top 11%
Division (M18-39)
#0 / 5642
Top 26%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:54
Rank: #3163
Start → 5K
19:54 | 6:24/mi
10K· 6.21 mi
39:48
Rank: #3107 (+56)
5K → 10K
19:54 | 6:24/mi
15K· 9.32 mi
59:39
Rank: #3008 (+99)
10K → 15K
19:51 | 6:23/mi
20K· 12.43 mi
1:19:34
Rank: #2862 (+146)
15K → 20K
19:55 | 6:25/mi
Half· 13.11 mi
1:23:54
Rank: #2865 (-3)
20K → Half
4:20 | 6:21/mi
25K· 15.53 mi
1:39:28
Rank: #2770 (+95)
Half → 25K
15:34 | 6:25/mi
30K· 18.64 mi
1:59:38
Rank: #2549 (+221)
25K → 30K
20:10 | 6:29/mi
20M
2:08:33
Rank: #2456 (+93)
30K → 20M
8:55 | 6:34/mi
21M
2:15:21
Rank: #2354 (+102)
20M → 21M
6:48 | 6:48/mi
35K· 21.75 mi
2:20:02
Rank: #2310 (+44)
21M → 35K
4:41 | 6:16/mi
23M
2:28:07
Rank: #2211 (+99)
35K → 23M
8:05 | 6:27/mi
24M
2:34:21
Rank: #2123 (+88)
23M → 24M
6:14 | 6:14/mi
40K· 24.85 mi
2:39:40
Rank: #2023 (+100)
24M → 40K
5:19 | 6:13/mi
25.2M
2:41:56
Rank: #1976 (+47)
40K → 25.2M
2:16 | 6:34/mi
Finish· 26.22 mi
2:47:51
Rank: #1855 (+121)
25.2M → Finish
5:55 | 5:48/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:23:54
Pace6:24 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:23:57
Pace6:24 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:5619:546:2419:54
6:24
-
10K
6.21 mi10:45:5039:486:2419:54
6:24
0:00
15K
9.32 mi11:05:4159:396:2419:51
6:23
-0:01
20K
12.43 mi11:25:361:19:346:2419:55
6:25
+0:02
Half
13.11 mi11:29:561:23:546:244:20
6:21
-0:04
25K
15.53 mi11:45:301:39:286:2415:34
6:25
+0:04
30K
18.64 mi12:05:401:59:386:2520:10
6:29
+0:04
20M
20.00 mi12:14:352:08:336:268:55
6:34
+0:05
21M
21.00 mi12:21:232:15:216:276:48
6:48
+0:14
35K
21.75 mi12:26:042:20:026:264:41
6:16
-0:32
23M
23.00 mi12:34:092:28:076:268:05
6:27
+0:11
24M
24.00 mi12:40:232:34:216:266:14
6:14
-0:13
40K
24.85 mi12:45:422:39:406:255:19
6:13
-0:01
25.2M
25.20 mi12:47:582:41:566:262:16
6:34
+0:21
Finish
26.22 mi12:53:532:47:516:245:55
5:48
-0:46

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

5:48 /mi

Average Pace

6:24 /mi

Slowest Pace

6:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

26:29

16% of race

Time at Steady Pace

2:21:22

84% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:24 /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 mi10:25:5619:546:2419:54
6:24
#3163
10K
6.21 mi10:45:5039:486:2419:54
6:24
#3107
15K
9.32 mi11:05:4159:396:2419:51
6:23
#3008
20K
12.43 mi11:25:361:19:346:2419:55
6:25
#2862
Half
13.11 mi11:29:561:23:546:244:20
6:21
#2865
25K
15.53 mi11:45:301:39:286:2415:34
6:25
#2770
30K
18.64 mi12:05:401:59:386:2520:10
6:29
#2549
20M
20.00 mi12:14:352:08:336:268:55
6:34
#2456
21M
21.00 mi12:21:232:15:216:276:48
6:48
#2354
35K
21.75 mi12:26:042:20:026:264:41
6:16
#2310
23M
23.00 mi12:34:092:28:076:268:05
6:27
#2211
24M
24.00 mi12:40:232:34:216:266:14
6:14
#2123
40K
24.85 mi12:45:422:39:406:255:19
6:13
#2023
25.2M
25.20 mi12:47:582:41:566:262:16
6:34
#1976
Finish
26.22 mi12:53:532:47:516:245:55
5:48
#1855
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3163300630062872(Top 10%)2737(Top 17%)2737(Top 49%)
10K6.21 mi3.10 mi3107+562955+512955+513077(Top 11%)2930(Top 18%)2930(Top 52%)
15K9.32 mi3.11 mi3008+992867+882867+882872(Top 10%)2737(Top 17%)2737(Top 49%)
20K12.43 mi3.11 mi2862+1462729+1382729+1382583(Top 9%)2463(Top 15%)2463(Top 44%)
Half13.11 mi0.68 mi2865-32731-22731-22810(Top 10%)2686(Top 17%)2686(Top 48%)
25K15.53 mi2.42 mi2770+952641+902641+902477(Top 9%)2355(Top 15%)2355(Top 42%)
30K18.64 mi3.11 mi2549+2212435+2062435+2061942(Top 7%)1848(Top 11%)1848(Top 33%)
20M20.00 mi1.36 mi2456+932342+932342+931879(Top 7%)1779(Top 11%)1779(Top 32%)
21M21.00 mi1.00 mi2354+1022242+1002242+1001551(Top 5%)1462(Top 9%)1462(Top 26%)
35K21.75 mi0.75 mi2310+442201+412201+411482(Top 5%)1406(Top 9%)1406(Top 25%)
23M23.00 mi1.25 mi2211+992105+962105+961332(Top 5%)1253(Top 8%)1253(Top 22%)
24M24.00 mi1.00 mi2123+882018+872018+871134(Top 4%)1067(Top 7%)1067(Top 19%)
40K24.85 mi0.85 mi2023+1001919+991919+99783(Top 3%)734(Top 5%)734(Top 13%)
25.2M25.20 mi0.35 mi1976+471874+451874+45587(Top 2%)547(Top 3%)547(Top 10%)
Finish26.22 mi1.02 mi1855+1211755+1191755+119531(Top 2%)498(Top 3%)498(Top 9%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2872

Males

2737

M18-39

2737

5K→10K

3.1 - 6.2 mi

Top 11%
×5stories
+79ft-138ft

Overall

3077

Males

2930

M18-39

2930

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2872

Males

2737

M18-39

2737

15K→20K

9.3 - 12.4 mi

Top 9%
×5stories
+106ft-86ft

Overall

2583

Males

2463

M18-39

2463

20K→Half

12.4 - 13.1 mi

Top 10%
×2stories
+19ft-37ft

Overall

2810

Males

2686

M18-39

2686

Half→25K

13.1 - 15.5 mi

Top 9%
×4stories
+66ft-88ft

Overall

2477

Males

2355

M18-39

2355

25K→30K

15.5 - 18.6 mi

Top 7%
×9stories
+181ft-148ft

Overall

1942

Males

1848

M18-39

1848

30K→20M

18.6 - 20.0 mi

Top 7%
×5stories
+64ft-50ft

Overall

1879

Males

1779

M18-39

1779

20M→21M

20.0 - 21.0 mi

Top 5%
×8stories
+106ft-24ft

Overall

1551

Males

1462

M18-39

1462

21M→35K

21.0 - 21.8 mi

Top 5%
×7stories
+17ft-86ft

Overall

1482

Males

1406

M18-39

1406

35K→23M

21.8 - 23.0 mi

Top 5%
×5stories
+23ft-63ft

Overall

1332

Males

1253

M18-39

1253

23M→24M

23.0 - 24.0 mi

Top 4%
×6stories
+12ft-82ft

Overall

1134

Males

1067

M18-39

1067

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

783

Males

734

M18-39

734

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

587

Males

547

M18-39

547

25.2M→Finish

25.2 - 26.2 mi

Top 2%
×2stories
+22ft-21ft

Overall

531

Males

498

M18-39

498

Passing Analysis

Category:
Athletes Passed
1534
Passed By
226
Net Change
+1308
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3163
5K → 10K158102+56#3163#3107
10K → 15K14142+99#3107#3008
15K → 20K16620+146#3008#2862
20K → Half1417-3#2862#2865
Half → 25K11318+95#2865#2770
25K → 30K2287+221#2770#2549
30K → 20M985+93#2549#2456
20M → 21M1064+102#2456#2354
21M → 35K451+44#2354#2310
35K → 23M1045+99#2310#2211
23M → 24M902+88#2211#2123
24M → 40K1011+100#2123#2023
40K → 25.2M470+47#2023#1976
25.2M → Finish1232+121#1976#1855
TOTALS1534226+1308
📊

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