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BOSTON MARATHON 2025

Joshua Tarn

Bib: 5399•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 8%
Gender (Male)
#0 / 16105
Top 13%
Division (M18-39)
#0 / 5642
Top 30%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:02
Rank: #3439
Start → 5K
20:02 | 6:27/mi
10K· 6.21 mi
39:54
Rank: #3202 (+237)
5K → 10K
19:52 | 6:24/mi
15K· 9.32 mi
59:38
Rank: #2991 (+211)
10K → 15K
19:44 | 6:21/mi
20K· 12.43 mi
1:19:20
Rank: #2753 (+238)
15K → 20K
19:42 | 6:20/mi
Half· 13.11 mi
1:23:40
Rank: #2752 (+1)
20K → Half
4:20 | 6:21/mi
25K· 15.53 mi
1:39:08
Rank: #2633 (+119)
Half → 25K
15:28 | 6:23/mi
30K· 18.64 mi
1:59:24
Rank: #2474 (+159)
25K → 30K
20:16 | 6:31/mi
20M
2:08:16
Rank: #2384 (+90)
30K → 20M
8:52 | 6:31/mi
21M
2:15:08
Rank: #2315 (+69)
20M → 21M
6:52 | 6:52/mi
35K· 21.75 mi
2:19:52
Rank: #2275 (+40)
21M → 35K
4:44 | 6:20/mi
23M
2:28:07
Rank: #2209 (+66)
35K → 23M
8:15 | 6:35/mi
24M
2:34:37
Rank: #2170 (+39)
23M → 24M
6:30 | 6:30/mi
40K· 24.85 mi
2:40:15
Rank: #2141 (+29)
24M → 40K
5:38 | 6:35/mi
25.2M
2:42:46
Rank: #2127 (+14)
40K → 25.2M
2:31 | 7:18/mi
Finish· 26.22 mi
2:49:20
Rank: #2135 (-8)
25.2M → Finish
6:34 | 6:27/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:23:40
Pace6:23 /mi
2nd Half
Distance13.11 mi
Time1:25:40
Pace6:32 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:3320:026:2720:02
6:27
-
10K
6.21 mi10:43:2539:546:2519:52
6:24
-0:03
15K
9.32 mi11:03:0959:386:2419:44
6:21
-0:03
20K
12.43 mi11:22:511:19:206:2319:42
6:20
-0:01
Half
13.11 mi11:27:111:23:406:234:20
6:21
+0:01
25K
15.53 mi11:42:391:39:086:2315:28
6:23
+0:02
30K
18.64 mi12:02:551:59:246:2420:16
6:31
+0:08
20M
20.00 mi12:11:472:08:166:258:52
6:31
0:00
21M
21.00 mi12:18:392:15:086:266:52
6:52
+0:21
35K
21.75 mi12:23:232:19:526:264:44
6:20
-0:32
23M
23.00 mi12:31:382:28:076:268:15
6:35
+0:15
24M
24.00 mi12:38:082:34:376:276:30
6:30
-0:05
40K
24.85 mi12:43:462:40:156:275:38
6:35
+0:05
25.2M
25.20 mi12:46:172:42:466:282:31
7:18
+0:43
Finish
26.22 mi12:52:512:49:206:286:34
6:27
-0:51

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

6:20 /mi

Average Pace

6:28 /mi

Slowest Pace

7:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:46:49

99% of race

Time at Steady Pace

2:31

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:27 /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 mi10:23:3320:026:2720:02
6:27
#3439
10K
6.21 mi10:43:2539:546:2519:52
6:24
#3202
15K
9.32 mi11:03:0959:386:2419:44
6:21
#2991
20K
12.43 mi11:22:511:19:206:2319:42
6:20
#2753
Half
13.11 mi11:27:111:23:406:234:20
6:21
#2752
25K
15.53 mi11:42:391:39:086:2315:28
6:23
#2633
30K
18.64 mi12:02:551:59:246:2420:16
6:31
#2474
20M
20.00 mi12:11:472:08:166:258:52
6:31
#2384
21M
21.00 mi12:18:392:15:086:266:52
6:52
#2315
35K
21.75 mi12:23:232:19:526:264:44
6:20
#2275
23M
23.00 mi12:31:382:28:076:268:15
6:35
#2209
24M
24.00 mi12:38:082:34:376:276:30
6:30
#2170
40K
24.85 mi12:43:462:40:156:275:38
6:35
#2141
25.2M
25.20 mi12:46:172:42:466:282:31
7:18
#2127
Finish
26.22 mi12:52:512:49:206:286:34
6:27
#2135
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3439326632662634(Top 9%)2511(Top 16%)2511(Top 45%)
10K6.21 mi3.10 mi3202+2373044+2223044+2222994(Top 11%)2850(Top 18%)2850(Top 51%)
15K9.32 mi3.11 mi2991+2112850+1942850+1942634(Top 9%)2511(Top 16%)2511(Top 45%)
20K12.43 mi3.11 mi2753+2382625+2252625+2252221(Top 8%)2116(Top 13%)2116(Top 38%)
Half13.11 mi0.68 mi2752+1262526252740(Top 10%)2616(Top 16%)2616(Top 46%)
25K15.53 mi2.42 mi2633+1192514+1112514+1112245(Top 8%)2135(Top 13%)2135(Top 38%)
30K18.64 mi3.11 mi2474+1592361+1532361+1532079(Top 7%)1976(Top 12%)1976(Top 35%)
20M20.00 mi1.36 mi2384+902275+862275+861711(Top 6%)1617(Top 10%)1617(Top 29%)
21M21.00 mi1.00 mi2315+692207+682207+681746(Top 6%)1647(Top 10%)1647(Top 29%)
35K21.75 mi0.75 mi2275+402167+402167+401717(Top 6%)1611(Top 10%)1611(Top 29%)
23M23.00 mi1.25 mi2209+662103+642103+641775(Top 6%)1661(Top 10%)1661(Top 29%)
24M24.00 mi1.00 mi2170+392063+402063+402032(Top 7%)1885(Top 12%)1885(Top 33%)
40K24.85 mi0.85 mi2141+292033+302033+301913(Top 7%)1763(Top 11%)1763(Top 31%)
25.2M25.20 mi0.35 mi2127+142020+132020+132448(Top 9%)2182(Top 14%)2182(Top 39%)
Finish26.22 mi1.02 mi2135-82026-62026-62503(Top 9%)2272(Top 14%)2272(Top 40%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 9%
×21stories
+97ft-345ft

Overall

2634

Males

2511

M18-39

2511

5K→10K

3.1 - 6.2 mi

Top 11%
×5stories
+79ft-138ft

Overall

2994

Males

2850

M18-39

2850

10K→15K

6.2 - 9.3 mi

Top 9%
×3stories
+67ft-78ft

Overall

2634

Males

2511

M18-39

2511

15K→20K

9.3 - 12.4 mi

Top 8%
×5stories
+106ft-86ft

Overall

2221

Males

2116

M18-39

2116

20K→Half

12.4 - 13.1 mi

Top 10%
×2stories
+19ft-37ft

Overall

2740

Males

2616

M18-39

2616

Half→25K

13.1 - 15.5 mi

Top 8%
×4stories
+66ft-88ft

Overall

2245

Males

2135

M18-39

2135

25K→30K

15.5 - 18.6 mi

Top 7%
×9stories
+181ft-148ft

Overall

2079

Males

1976

M18-39

1976

30K→20M

18.6 - 20.0 mi

Top 6%
×5stories
+64ft-50ft

Overall

1711

Males

1617

M18-39

1617

20M→21M

20.0 - 21.0 mi

Top 6%
×8stories
+106ft-24ft

Overall

1746

Males

1647

M18-39

1647

21M→35K

21.0 - 21.8 mi

Top 6%
×7stories
+17ft-86ft

Overall

1717

Males

1611

M18-39

1611

35K→23M

21.8 - 23.0 mi

Top 6%
×5stories
+23ft-63ft

Overall

1775

Males

1661

M18-39

1661

23M→24M

23.0 - 24.0 mi

Top 7%
×6stories
+12ft-82ft

Overall

2032

Males

1885

M18-39

1885

24M→40K

24.0 - 24.9 mi

Top 7%
×1story
+6ft-20ft

Overall

1913

Males

1763

M18-39

1763

40K→25.2M

24.9 - 25.2 mi

Top 9%
×1story
+13ft-16ft

Overall

2448

Males

2182

M18-39

2182

25.2M→Finish

25.2 - 26.2 mi

Top 9%
×2stories
+22ft-21ft

Overall

2503

Males

2272

M18-39

2272

Passing Analysis

Category:
Athletes Passed
1517
Passed By
213
Net Change
+1304
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3439
5K → 10K27942+237#3439#3202
10K → 15K22312+211#3202#2991
15K → 20K2457+238#2991#2753
20K → Half1312+1#2753#2752
Half → 25K13516+119#2752#2633
25K → 30K17920+159#2633#2474
30K → 20M988+90#2474#2384
20M → 21M734+69#2384#2315
21M → 35K444+40#2315#2275
35K → 23M7812+66#2275#2209
23M → 24M5112+39#2209#2170
24M → 40K5021+29#2170#2141
40K → 25.2M2410+14#2141#2127
25.2M → Finish2533-8#2127#2135
TOTALS1517213+1304
📊

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