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BOSTON MARATHON 2025

Alexander Tosi

Bib: 1179•M

TX

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 3%
Gender (Male)
#0 / 16105
Top 5%
Division (M18-39)
#0 / 5642
Top 13%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:24
Rank: #850
Start → 5K
18:24 | 5:55/mi
10K· 6.21 mi
36:32
Rank: #751 (+99)
5K → 10K
18:08 | 5:50/mi
15K· 9.32 mi
54:42
Rank: #712 (+39)
10K → 15K
18:10 | 5:51/mi
20K· 12.43 mi
1:14:30
Rank: #980 (-268)
15K → 20K
19:48 | 6:22/mi
Half· 13.11 mi
1:18:24
Rank: #946 (+34)
20K → Half
3:54 | 5:43/mi
25K· 15.53 mi
1:32:43
Rank: #870 (+76)
Half → 25K
14:19 | 5:54/mi
30K· 18.64 mi
1:51:40
Rank: #804 (+66)
25K → 30K
18:57 | 6:06/mi
20M
2:00:12
Rank: #794 (+10)
30K → 20M
8:32 | 6:17/mi
21M
2:07:07
Rank: #815 (-21)
20M → 21M
6:55 | 6:55/mi
35K· 21.75 mi
2:11:41
Rank: #811 (+4)
21M → 35K
4:34 | 6:06/mi
23M
2:19:45
Rank: #812 (-1)
35K → 23M
8:04 | 6:27/mi
24M
2:25:53
Rank: #801 (+11)
23M → 24M
6:08 | 6:08/mi
40K· 24.85 mi
2:31:38
Rank: #827 (-26)
24M → 40K
5:45 | 6:44/mi
25.2M
2:34:12
Rank: #844 (-17)
40K → 25.2M
2:34 | 7:27/mi
Finish· 26.22 mi
2:41:06
Rank: #910 (-66)
25.2M → Finish
6:54 | 6:46/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:18:24
Pace5:59 /mi
2nd Half
Distance13.11 mi
Time1:22:42
Pace6:19 /mi
📊Positive Split: 5.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:3618:245:5518:24
5:55
-
10K
6.21 mi10:36:4436:325:5318:08
5:50
-0:05
15K
9.32 mi10:54:5454:425:5218:10
5:51
+0:01
20K
12.43 mi11:14:421:14:306:0019:48
6:22
+0:31
Half
13.11 mi11:18:361:18:245:593:54
5:43
-0:39
25K
15.53 mi11:32:551:32:435:5814:19
5:54
+0:11
30K
18.64 mi11:51:521:51:405:5918:57
6:06
+0:12
20M
20.00 mi12:00:242:00:126:018:32
6:17
+0:11
21M
21.00 mi12:07:192:07:076:036:55
6:55
+0:38
35K
21.75 mi12:11:532:11:416:034:34
6:06
-0:49
23M
23.00 mi12:19:572:19:456:058:04
6:27
+0:21
24M
24.00 mi12:26:052:25:536:056:08
6:08
-0:19
40K
24.85 mi12:31:502:31:386:065:45
6:44
+0:36
25.2M
25.20 mi12:34:242:34:126:072:34
7:27
+0:43
Finish
26.22 mi12:41:182:41:066:096:54
6:46
-0:41

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

5:43 /mi

Average Pace

6:09 /mi

Slowest Pace

7:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

40:12

25% of race

Time at Steady Pace

1:30:42

56% of race

Time at Slower Pace

30:12

19% of race

Average Pace: 6:09 /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 mi10:18:3618:245:5518:24
5:55
#850
10K
6.21 mi10:36:4436:325:5318:08
5:50
#751
15K
9.32 mi10:54:5454:425:5218:10
5:51
#712
20K
12.43 mi11:14:421:14:306:0019:48
6:22
#980
Half
13.11 mi11:18:361:18:245:593:54
5:43
#946
25K
15.53 mi11:32:551:32:435:5814:19
5:54
#870
30K
18.64 mi11:51:521:51:405:5918:57
6:06
#804
20M
20.00 mi12:00:242:00:126:018:32
6:17
#794
21M
21.00 mi12:07:192:07:076:036:55
6:55
#815
35K
21.75 mi12:11:532:11:416:034:34
6:06
#811
23M
23.00 mi12:19:572:19:456:058:04
6:27
#812
24M
24.00 mi12:26:052:25:536:056:08
6:08
#801
40K
24.85 mi12:31:502:31:386:065:45
6:44
#827
25.2M
25.20 mi12:34:242:34:126:072:34
7:27
#844
Finish
26.22 mi12:41:182:41:066:096:54
6:46
#910
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi850796796628(Top 2%)582(Top 4%)582(Top 10%)
10K6.21 mi3.10 mi751+99700+96700+96680(Top 2%)635(Top 4%)635(Top 11%)
15K9.32 mi3.11 mi712+39664+36664+36628(Top 2%)582(Top 4%)582(Top 10%)
20K12.43 mi3.11 mi980-268923-259923-2592368(Top 8%)2258(Top 14%)2258(Top 40%)
Half13.11 mi0.68 mi946+34891+32891+32453(Top 2%)425(Top 3%)425(Top 8%)
25K15.53 mi2.42 mi870+76818+73818+73586(Top 2%)541(Top 3%)541(Top 10%)
30K18.64 mi3.11 mi804+66754+64754+64684(Top 2%)640(Top 4%)640(Top 11%)
20M20.00 mi1.36 mi794+10744+10744+10901(Top 3%)849(Top 5%)849(Top 15%)
21M21.00 mi1.00 mi815-21765-21765-211918(Top 7%)1807(Top 11%)1807(Top 32%)
35K21.75 mi0.75 mi811+4761+4761+4954(Top 3%)897(Top 6%)897(Top 16%)
23M23.00 mi1.25 mi812-1762-1762-11267(Top 4%)1192(Top 7%)1192(Top 21%)
24M24.00 mi1.00 mi801+11750+12750+12845(Top 3%)794(Top 5%)794(Top 14%)
40K24.85 mi0.85 mi827-26775-25775-252447(Top 9%)2229(Top 14%)2229(Top 40%)
25.2M25.20 mi0.35 mi844-17790-15790-153058(Top 11%)2699(Top 17%)2699(Top 48%)
Finish26.22 mi1.02 mi910-66853-63853-634290(Top 15%)3634(Top 23%)3634(Top 64%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21stories
+97ft-345ft

Overall

628

Males

582

M18-39

582

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

680

Males

635

M18-39

635

10K→15K

6.2 - 9.3 mi

Top 2%
×3stories
+67ft-78ft

Overall

628

Males

582

M18-39

582

15K→20K

9.3 - 12.4 mi

Top 8%
×5stories
+106ft-86ft

Overall

2368

Males

2258

M18-39

2258

20K→Half

12.4 - 13.1 mi

Top 2%
×2stories
+19ft-37ft

Overall

453

Males

425

M18-39

425

Half→25K

13.1 - 15.5 mi

Top 2%
×4stories
+66ft-88ft

Overall

586

Males

541

M18-39

541

25K→30K

15.5 - 18.6 mi

Top 2%
×9stories
+181ft-148ft

Overall

684

Males

640

M18-39

640

30K→20M

18.6 - 20.0 mi

Top 3%
×5stories
+64ft-50ft

Overall

901

Males

849

M18-39

849

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

1918

Males

1807

M18-39

1807

21M→35K

21.0 - 21.8 mi

Top 3%
×7stories
+17ft-86ft

Overall

954

Males

897

M18-39

897

35K→23M

21.8 - 23.0 mi

Top 4%
×5stories
+23ft-63ft

Overall

1267

Males

1192

M18-39

1192

23M→24M

23.0 - 24.0 mi

Top 3%
×6stories
+12ft-82ft

Overall

845

Males

794

M18-39

794

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2447

Males

2229

M18-39

2229

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

3058

Males

2699

M18-39

2699

25.2M→Finish

25.2 - 26.2 mi

Top 15%
×2stories
+22ft-21ft

Overall

4290

Males

3634

M18-39

3634

Passing Analysis

Category:
Athletes Passed
444
Passed By
504
Net Change
-60
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#850
5K → 10K1056+99#850#751
10K → 15K478+39#751#712
15K → 20K4272-268#712#980
20K → Half340+34#980#946
Half → 25K771+76#946#870
25K → 30K759+66#870#804
30K → 20M2212+10#804#794
20M → 21M1031-21#794#815
21M → 35K1410+4#815#811
35K → 23M1819-1#811#812
23M → 24M2413+11#812#801
24M → 40K632-26#801#827
40K → 25.2M219-17#827#844
25.2M → Finish672-66#844#910
TOTALS444504-60
📊

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