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BOSTON MARATHON 2025

Aleksei Udalov

Bib: 6251•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 10%
Gender (Male)
#0 / 16105
Top 16%
Division (M18-39)
#0 / 5642
Top 36%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:53
Rank: #3121
Start → 5K
19:53 | 6:24/mi
10K· 6.21 mi
39:53
Rank: #3195 (-74)
5K → 10K
20:00 | 6:26/mi
15K· 9.32 mi
59:47
Rank: #3106 (+89)
10K → 15K
19:54 | 6:24/mi
20K· 12.43 mi
1:19:51
Rank: #3016 (+90)
15K → 20K
20:04 | 6:28/mi
Half· 13.11 mi
1:24:11
Rank: #3001 (+15)
20K → Half
4:20 | 6:21/mi
25K· 15.53 mi
1:39:49
Rank: #2906 (+95)
Half → 25K
15:38 | 6:27/mi
30K· 18.64 mi
2:00:51
Rank: #2931 (-25)
25K → 30K
21:02 | 6:46/mi
20M
2:10:04
Rank: #2891 (+40)
30K → 20M
9:13 | 6:47/mi
21M
2:17:12
Rank: #2863 (+28)
20M → 21M
7:08 | 7:08/mi
35K· 21.75 mi
2:22:07
Rank: #2839 (+24)
21M → 35K
4:55 | 6:34/mi
23M
2:30:37
Rank: #2783 (+56)
35K → 23M
8:30 | 6:47/mi
24M
2:37:20
Rank: #2758 (+25)
23M → 24M
6:43 | 6:43/mi
40K· 24.85 mi
2:43:14
Rank: #2743 (+15)
24M → 40K
5:54 | 6:54/mi
25.2M
2:45:49
Rank: #2729 (+14)
40K → 25.2M
2:35 | 7:29/mi
Finish· 26.22 mi
2:52:26
Rank: #2707 (+22)
25.2M → Finish
6:37 | 6:30/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:11
Pace6:25 /mi
2nd Half
Distance13.11 mi
Time1:28:15
Pace6:44 /mi
📊Positive Split: 4.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:2119:536:2419:53
6:24
-
10K
6.21 mi10:44:2139:536:2520:00
6:26
+0:02
15K
9.32 mi11:04:1559:476:2519:54
6:24
-0:02
20K
12.43 mi11:24:191:19:516:2620:04
6:28
+0:04
Half
13.11 mi11:28:391:24:116:254:20
6:21
-0:07
25K
15.53 mi11:44:171:39:496:2615:38
6:27
+0:06
30K
18.64 mi12:05:192:00:516:2921:02
6:46
+0:19
20M
20.00 mi12:14:322:10:046:309:13
6:47
+0:01
21M
21.00 mi12:21:402:17:126:327:08
7:08
+0:21
35K
21.75 mi12:26:352:22:076:324:55
6:34
-0:34
23M
23.00 mi12:35:052:30:376:338:30
6:47
+0:13
24M
24.00 mi12:41:482:37:206:336:43
6:43
-0:04
40K
24.85 mi12:47:422:43:146:345:54
6:54
+0:11
25.2M
25.20 mi12:50:172:45:496:352:35
7:29
+0:35
Finish
26.22 mi12:56:542:52:266:356:37
6:30
-0:59

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

6:21 /mi

Average Pace

6:35 /mi

Slowest Pace

7:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:42:43

94% of race

Time at Steady Pace

9:43

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:35 /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 mi10:24:2119:536:2419:53
6:24
#3121
10K
6.21 mi10:44:2139:536:2520:00
6:26
#3195
15K
9.32 mi11:04:1559:476:2519:54
6:24
#3106
20K
12.43 mi11:24:191:19:516:2620:04
6:28
#3016
Half
13.11 mi11:28:391:24:116:254:20
6:21
#3001
25K
15.53 mi11:44:171:39:496:2615:38
6:27
#2906
30K
18.64 mi12:05:192:00:516:2921:02
6:46
#2931
20M
20.00 mi12:14:322:10:046:309:13
6:47
#2891
21M
21.00 mi12:21:402:17:126:327:08
7:08
#2863
35K
21.75 mi12:26:352:22:076:324:55
6:34
#2839
23M
23.00 mi12:35:052:30:376:338:30
6:47
#2783
24M
24.00 mi12:41:482:37:206:336:43
6:43
#2758
40K
24.85 mi12:47:422:43:146:345:54
6:54
#2743
25.2M
25.20 mi12:50:172:45:496:352:35
7:29
#2729
Finish
26.22 mi12:56:542:52:266:356:37
6:30
#2707
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3121296529652982(Top 10%)2841(Top 18%)2841(Top 50%)
10K6.21 mi3.10 mi3195-743039-743039-743296(Top 12%)3133(Top 19%)3133(Top 56%)
15K9.32 mi3.11 mi3106+892959+802959+802982(Top 10%)2841(Top 18%)2841(Top 50%)
20K12.43 mi3.11 mi3016+902875+842875+842876(Top 10%)2739(Top 17%)2739(Top 49%)
Half13.11 mi0.68 mi3001+152860+152860+152837(Top 10%)2713(Top 17%)2713(Top 48%)
25K15.53 mi2.42 mi2906+952772+882772+882621(Top 9%)2495(Top 15%)2495(Top 44%)
30K18.64 mi3.11 mi2931-252791-192791-193260(Top 11%)3053(Top 19%)3053(Top 54%)
20M20.00 mi1.36 mi2891+402751+402751+402847(Top 10%)2663(Top 17%)2663(Top 47%)
21M21.00 mi1.00 mi2863+282724+272724+272844(Top 10%)2638(Top 16%)2638(Top 47%)
35K21.75 mi0.75 mi2839+242699+252699+252849(Top 10%)2631(Top 16%)2631(Top 47%)
23M23.00 mi1.25 mi2783+562641+582641+582656(Top 9%)2448(Top 15%)2448(Top 43%)
24M24.00 mi1.00 mi2758+252615+262615+263076(Top 11%)2789(Top 17%)2789(Top 49%)
40K24.85 mi0.85 mi2743+152600+152600+153363(Top 12%)3005(Top 19%)3005(Top 53%)
25.2M25.20 mi0.35 mi2729+142584+162584+163387(Top 12%)2977(Top 18%)2977(Top 53%)
Finish26.22 mi1.02 mi2707+222561+232561+232798(Top 10%)2505(Top 16%)2505(Top 44%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2982

Males

2841

M18-39

2841

5K→10K

3.1 - 6.2 mi

Top 12%
×5stories
+79ft-138ft

Overall

3296

Males

3133

M18-39

3133

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2982

Males

2841

M18-39

2841

15K→20K

9.3 - 12.4 mi

Top 10%
×5stories
+106ft-86ft

Overall

2876

Males

2739

M18-39

2739

20K→Half

12.4 - 13.1 mi

Top 10%
×2stories
+19ft-37ft

Overall

2837

Males

2713

M18-39

2713

Half→25K

13.1 - 15.5 mi

Top 9%
×4stories
+66ft-88ft

Overall

2621

Males

2495

M18-39

2495

25K→30K

15.5 - 18.6 mi

Top 11%
×9stories
+181ft-148ft

Overall

3260

Males

3053

M18-39

3053

30K→20M

18.6 - 20.0 mi

Top 10%
×5stories
+64ft-50ft

Overall

2847

Males

2663

M18-39

2663

20M→21M

20.0 - 21.0 mi

Top 10%
×8stories
+106ft-24ft

Overall

2844

Males

2638

M18-39

2638

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2849

Males

2631

M18-39

2631

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2656

Males

2448

M18-39

2448

23M→24M

23.0 - 24.0 mi

Top 11%
×6stories
+12ft-82ft

Overall

3076

Males

2789

M18-39

2789

24M→40K

24.0 - 24.9 mi

Top 12%
×1story
+6ft-20ft

Overall

3363

Males

3005

M18-39

3005

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3387

Males

2977

M18-39

2977

25.2M→Finish

25.2 - 26.2 mi

Top 10%
×2stories
+22ft-21ft

Overall

2798

Males

2505

M18-39

2505

Passing Analysis

Category:
Athletes Passed
1021
Passed By
607
Net Change
+414
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3121
5K → 10K103177-74#3121#3195
10K → 15K13243+89#3195#3106
15K → 20K13040+90#3106#3016
20K → Half205+15#3016#3001
Half → 25K12025+95#3001#2906
25K → 30K107132-25#2906#2931
30K → 20M7333+40#2931#2891
20M → 21M5729+28#2891#2863
21M → 35K4319+24#2863#2839
35K → 23M7317+56#2839#2783
23M → 24M5227+25#2783#2758
24M → 40K4328+15#2758#2743
40K → 25.2M2612+14#2743#2729
25.2M → Finish4220+22#2729#2707
TOTALS1021607+414
📊

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