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BOSTON MARATHON 2025

Anthony Loui

Bib: 32221•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
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
8:16/mi
25:41
↑ 97↓ 3451.5%
10K· 6.21 mi
8:02/mi
50:40
↑ 79↓ 1380.4%
15K· 9.32 mi
7:58/mi
1:15:26
↑ 67↓ 78
20K· 12.43 mi
8:24/mi
1:41:31
↑ 106↓ 860.1%
Half· 13.11 mi
8:21/mi
1:47:13
↑ 19↓ 370.5%
25K· 15.53 mi
9:30/mi
2:10:15
↑ 66↓ 880.2%
30K· 18.64 mi
10:31/mi
2:42:54
↑ 181↓ 1480.2%
20M
11:09/mi
2:58:03
↑ 64↓ 500.2%
21M
11:52/mi
3:09:55
↑ 106↓ 241.6%
35K· 21.75 mi
11:35/mi
3:18:35
↑ 17↓ 861.7%
23M
10:37/mi
3:31:53
↑ 23↓ 630.6%
24M
11:19/mi
3:43:12
↓ 821.3%
40K· 24.85 mi
12:00/mi
3:53:28
↓ 200.3%
25.2M
11:53/mi
3:57:34
↑ 13↓ 160.2%
Finish· 26.22 mi
9:46/mi
4:07:31
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:13
Pace8:11 /mi
2nd Half
Distance13.11 mi
Time2:20:18
Pace10:42 /mi
📊Positive Split: 30.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:4225:418:1625:41
8:16
-
10K
6.21 mi12:14:4150:408:0924:59
8:02
-0:14
15K
9.32 mi12:39:271:15:268:0624:46
7:58
-0:04
20K
12.43 mi13:05:321:41:318:1026:05
8:24
+0:26
Half
13.11 mi13:11:141:47:138:115:42
8:21
-0:03
25K
15.53 mi13:34:162:10:158:2323:02
9:30
+1:09
30K
18.64 mi14:06:552:42:548:4432:39
10:31
+1:01
20M
20.00 mi14:22:042:58:038:5415:09
11:09
+0:38
21M
21.00 mi14:33:563:09:559:0311:52
11:52
+0:43
35K
21.75 mi14:42:363:18:359:088:40
11:35
-0:17
23M
23.00 mi14:55:543:31:539:1313:18
10:37
-0:58
24M
24.00 mi15:07:133:43:129:1811:19
11:19
+0:42
40K
24.85 mi15:17:293:53:289:2410:16
12:00
+0:41
25.2M
25.20 mi15:21:353:57:349:264:06
11:53
-0:07
Finish
26.22 mi15:31:324:07:319:279:57
9:46
-2:07

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

7:58 /mi

Average Pace

9:27 /mi

Slowest Pace

12:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:20:12

57% of race

Time at Steady Pace

1:01:06

25% of race

Time at Slower Pace

46:13

19% of race

Average Pace: 9:26 /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 mi11:49:4225:418:1625:41
8:16
#18509
10K
6.21 mi12:14:4150:408:0924:59
8:02
#17658
15K
9.32 mi12:39:271:15:268:0624:46
7:58
#17027
20K
12.43 mi13:05:321:41:318:1026:05
8:24
#17143
Half
13.11 mi13:11:141:47:138:115:42
8:21
#17186
25K
15.53 mi13:34:162:10:158:2323:02
9:30
#18165
30K
18.64 mi14:06:552:42:548:4432:39
10:31
#19532
20M
20.00 mi14:22:042:58:038:5415:09
11:09
#20097
21M
21.00 mi14:33:563:09:559:0311:52
11:52
#20408
35K
21.75 mi14:42:363:18:359:088:40
11:35
#20710
23M
23.00 mi14:55:543:31:539:1313:18
10:37
#20881
24M
24.00 mi15:07:133:43:129:1811:19
11:19
#21125
40K
24.85 mi15:17:293:53:289:2410:16
12:00
#21359
25.2M
25.20 mi15:21:353:57:349:264:06
11:53
#21385
Finish
26.22 mi15:31:324:07:319:279:57
9:46
#21401
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi18509118231182315820(Top 56%)10725(Top 67%)10725(Top 190%)
10K6.21 mi3.10 mi17658+85111479+34411479+34416777(Top 59%)11155(Top 69%)11155(Top 198%)
15K9.32 mi3.11 mi17027+63111246+23311246+23315820(Top 56%)10725(Top 67%)10725(Top 190%)
20K12.43 mi3.11 mi17143-11611268-2211268-2217521(Top 62%)11414(Top 71%)11414(Top 202%)
Half13.11 mi0.68 mi17186-4311283-1511283-1518286(Top 64%)11764(Top 73%)11764(Top 209%)
25K15.53 mi2.42 mi18165-97911661-37811661-37821851(Top 77%)13220(Top 82%)13220(Top 234%)
30K18.64 mi3.11 mi19532-136712218-55712218-55722958(Top 81%)13597(Top 84%)13597(Top 241%)
20M20.00 mi1.36 mi20097-56512439-22112439-22123875(Top 84%)13922(Top 86%)13922(Top 247%)
21M21.00 mi1.00 mi20408-31112553-11412553-11423339(Top 82%)13603(Top 84%)13603(Top 241%)
35K21.75 mi0.75 mi20710-30212678-12512678-12525220(Top 89%)14450(Top 90%)14450(Top 256%)
23M23.00 mi1.25 mi20881-17112729-5112729-5122326(Top 79%)13030(Top 81%)13030(Top 231%)
24M24.00 mi1.00 mi21125-24412810-8112810-8124592(Top 87%)14100(Top 88%)14100(Top 250%)
40K24.85 mi0.85 mi21359-23412909-9912909-9924933(Top 88%)14226(Top 88%)14226(Top 252%)
25.2M25.20 mi0.35 mi21385-2612910-112910-122972(Top 81%)13266(Top 82%)13266(Top 235%)
Finish26.22 mi1.02 mi21401-1612901+912901+922135(Top 78%)12849(Top 80%)12849(Top 228%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21story building
+97ft-345ft

Overall

15820

Males

10725

M18-39

10725

5K→10K

3.1 - 6.2 mi

Top 59%
×5story building
+79ft-138ft

Overall

16777

Males

11155

M18-39

11155

10K→15K

6.2 - 9.3 mi

Top 56%
×3story building
+67ft-78ft

Overall

15820

Males

10725

M18-39

10725

15K→20K

9.3 - 12.4 mi

Top 62%
×5story building
+106ft-86ft

Overall

17521

Males

11414

M18-39

11414

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

18286

Males

11764

M18-39

11764

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

21851

Males

13220

M18-39

13220

25K→30K

15.5 - 18.6 mi

Top 81%
×9story building
+181ft-148ft

Overall

22958

Males

13597

M18-39

13597

30K→20M

18.6 - 20.0 mi

Top 84%
×5story building
+64ft-50ft

Overall

23875

Males

13922

M18-39

13922

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

23339

Males

13603

M18-39

13603

21M→35K

21.0 - 21.8 mi

Top 89%
×7story building
+17ft-86ft

Overall

25220

Males

14450

M18-39

14450

35K→23M

21.8 - 23.0 mi

Top 79%
×5story building
+23ft-63ft

Overall

22326

Males

13030

M18-39

13030

23M→24M

23.0 - 24.0 mi

Top 87%
×6story building
+12ft-82ft

Overall

24592

Males

14100

M18-39

14100

24M→40K

24.0 - 24.9 mi

Top 88%
×1story
+6ft-20ft

Overall

24933

Males

14226

M18-39

14226

40K→25.2M

24.9 - 25.2 mi

Top 81%
×1story
+13ft-16ft

Overall

22972

Males

13266

M18-39

13266

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2story building
+22ft-21ft

Overall

22135

Males

12849

M18-39

12849

Passing Analysis

Category:
Athletes Passed
1970
Passed By
4862
Net Change
-2892
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18509
5K → 10K89140+851#18509#17658
10K → 15K65524+631#17658#17027
15K → 20K155271-116#17027#17143
20K → Half1861-43#17143#17186
Half → 25K281007-979#17186#18165
25K → 30K321399-1367#18165#19532
30K → 20M21586-565#19532#20097
20M → 21M27338-311#20097#20408
21M → 35K11313-302#20408#20710
35K → 23M47218-171#20710#20881
23M → 24M16260-244#20881#21125
24M → 40K10244-234#21125#21359
40K → 25.2M1945-26#21359#21385
25.2M → Finish4056-16#21385#21401
TOTALS19704862-2892
📊

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