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BOSTON MARATHON 2025

Thomas Lee

Bib: 12856•M

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 48%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M45-49)
#0 / 2386
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
6:54/mi
21:27
↑ 97↓ 3451.5%
10K· 6.21 mi
6:48/mi
42:34
↑ 79↓ 1380.4%
15K· 9.32 mi
6:53/mi
1:03:58
↑ 67↓ 78
20K· 12.43 mi
7:53/mi
1:28:29
↑ 106↓ 860.1%
Half· 13.11 mi
8:52/mi
1:34:32
↑ 19↓ 370.5%
25K· 15.53 mi
8:53/mi
1:56:04
↑ 66↓ 880.2%
30K· 18.64 mi
8:35/mi
2:22:44
↑ 181↓ 1480.2%
20M
8:59/mi
2:34:56
↑ 64↓ 500.2%
21M
10:03/mi
2:44:59
↑ 106↓ 241.6%
35K· 21.75 mi
8:16/mi
2:51:10
↑ 17↓ 861.7%
23M
9:08/mi
3:02:36
↑ 23↓ 630.6%
24M
9:02/mi
3:11:38
↓ 821.3%
40K· 24.85 mi
9:24/mi
3:19:40
↓ 200.3%
25.2M
9:57/mi
3:23:06
↑ 13↓ 160.2%
Finish· 26.22 mi
8:39/mi
3:31:55
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:32
Pace7:13 /mi
2nd Half
Distance13.11 mi
Time1:57:23
Pace8:57 /mi
📊Positive Split: 24.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:3521:276:5421:27
6:54
-
10K
6.21 mi11:10:4242:346:5121:07
6:48
-0:06
15K
9.32 mi11:32:061:03:586:5221:24
6:53
+0:05
20K
12.43 mi11:56:371:28:297:0724:31
7:53
+1:00
Half
13.11 mi12:02:401:34:327:136:03
8:52
+0:59
25K
15.53 mi12:24:121:56:047:2821:32
8:53
+0:01
30K
18.64 mi12:50:522:22:447:3926:40
8:35
-0:18
20M
20.00 mi13:03:042:34:567:4512:12
8:59
+0:24
21M
21.00 mi13:13:072:44:597:5110:03
10:03
+1:04
35K
21.75 mi13:19:182:51:107:526:11
8:16
-1:47
23M
23.00 mi13:30:443:02:367:5611:26
9:08
+0:52
24M
24.00 mi13:39:463:11:387:599:02
9:02
-0:06
40K
24.85 mi13:47:483:19:408:028:02
9:24
+0:22
25.2M
25.20 mi13:51:143:23:068:043:26
9:57
+0:33
Finish
26.22 mi14:00:033:31:558:058:49
8:39
-1:18

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

6:48 /mi

Average Pace

8:05 /mi

Slowest Pace

10:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:34:40

45% of race

Time at Steady Pace

1:35:44

45% of race

Time at Slower Pace

21:31

10% of race

Average Pace: 8:05 /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 mi10:49:3521:276:5421:27
6:54
#7115
10K
6.21 mi11:10:4242:346:5121:07
6:48
#6765
15K
9.32 mi11:32:061:03:586:5221:24
6:53
#6783
20K
12.43 mi11:56:371:28:297:0724:31
7:53
#8308
Half
13.11 mi12:02:401:34:327:136:03
8:52
#9088
25K
15.53 mi12:24:121:56:047:2821:32
8:53
#11096
30K
18.64 mi12:50:522:22:447:3926:40
8:35
#11881
20M
20.00 mi13:03:042:34:567:4512:12
8:59
#12293
21M
21.00 mi13:13:072:44:597:5110:03
10:03
#12748
35K
21.75 mi13:19:182:51:107:526:11
8:16
#12813
23M
23.00 mi13:30:443:02:367:5611:26
9:08
#13071
24M
24.00 mi13:39:463:11:387:599:02
9:02
#13283
40K
24.85 mi13:47:483:19:408:028:02
9:24
#13508
25.2M
25.20 mi13:51:143:23:068:043:26
9:57
#13581
Finish
26.22 mi14:00:033:31:558:058:49
8:39
#13722
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi7115639463946869(Top 24%)6157(Top 38%)6157(Top 258%)
10K6.21 mi3.10 mi6765+3506112+2826112+2826370(Top 22%)5779(Top 36%)5779(Top 242%)
15K9.32 mi3.11 mi6783-186111+16111+16869(Top 24%)6157(Top 38%)6157(Top 258%)
20K12.43 mi3.11 mi8308-15257143-10327143-103214000(Top 49%)9867(Top 61%)9867(Top 414%)
Half13.11 mi0.68 mi9088-7807614-4717614-47121176(Top 75%)12973(Top 81%)12973(Top 544%)
25K15.53 mi2.42 mi11096-20088630-10168630-101619326(Top 68%)12110(Top 75%)12110(Top 508%)
30K18.64 mi3.11 mi11881-7858917-2878917-28715272(Top 54%)10170(Top 63%)10170(Top 426%)
20M20.00 mi1.36 mi12293-4129068-1519068-15116652(Top 59%)10653(Top 66%)10653(Top 446%)
21M21.00 mi1.00 mi12748-4559242-1749242-17418467(Top 65%)11371(Top 71%)11371(Top 477%)
35K21.75 mi0.75 mi12813-659255-139255-1314004(Top 49%)9289(Top 58%)9289(Top 389%)
23M23.00 mi1.25 mi13071-2589325-709325-7016982(Top 60%)10495(Top 65%)10495(Top 440%)
24M24.00 mi1.00 mi13283-2129394-699394-6917514(Top 62%)10696(Top 66%)10696(Top 448%)
40K24.85 mi0.85 mi13508-2259468-749468-7418234(Top 64%)10940(Top 68%)10940(Top 459%)
25.2M25.20 mi0.35 mi13581-739484-169484-1616748(Top 59%)10231(Top 64%)10231(Top 429%)
Finish26.22 mi1.02 mi13722-1419511-279511-2717158(Top 60%)10468(Top 65%)10468(Top 439%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 24%
×21story building
+97ft-345ft

Overall

6869

Males

6157

M45-49

6157

5K→10K

3.1 - 6.2 mi

Top 22%
×5story building
+79ft-138ft

Overall

6370

Males

5779

M45-49

5779

10K→15K

6.2 - 9.3 mi

Top 24%
×3story building
+67ft-78ft

Overall

6869

Males

6157

M45-49

6157

15K→20K

9.3 - 12.4 mi

Top 49%
×5story building
+106ft-86ft

Overall

14000

Males

9867

M45-49

9867

20K→Half

12.4 - 13.1 mi

Top 75%
×2story building
+19ft-37ft

Overall

21176

Males

12973

M45-49

12973

Half→25K

13.1 - 15.5 mi

Top 68%
×4story building
+66ft-88ft

Overall

19326

Males

12110

M45-49

12110

25K→30K

15.5 - 18.6 mi

Top 54%
×9story building
+181ft-148ft

Overall

15272

Males

10170

M45-49

10170

30K→20M

18.6 - 20.0 mi

Top 59%
×5story building
+64ft-50ft

Overall

16652

Males

10653

M45-49

10653

20M→21M

20.0 - 21.0 mi

Top 65%
×8story building
+106ft-24ft

Overall

18467

Males

11371

M45-49

11371

21M→35K

21.0 - 21.8 mi

Top 49%
×7story building
+17ft-86ft

Overall

14004

Males

9289

M45-49

9289

35K→23M

21.8 - 23.0 mi

Top 60%
×5story building
+23ft-63ft

Overall

16982

Males

10495

M45-49

10495

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

17514

Males

10696

M45-49

10696

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

18234

Males

10940

M45-49

10940

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

16748

Males

10231

M45-49

10231

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2story building
+22ft-21ft

Overall

17158

Males

10468

M45-49

10468

Passing Analysis

Category:
Athletes Passed
918
Passed By
7523
Net Change
-6607
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7115
5K → 10K40757+350#7115#6765
10K → 15K138156-18#6765#6783
15K → 20K71532-1525#6783#8308
20K → Half1781-780#8308#9088
Half → 25K132019-2008#9088#11096
25K → 30K70855-785#11096#11881
30K → 20M44456-412#11881#12293
20M → 21M29484-455#12293#12748
21M → 35K40105-65#12748#12813
35K → 23M58316-258#12813#13071
23M → 24M25237-212#13071#13283
24M → 40K33258-225#13283#13508
40K → 25.2M2194-73#13508#13581
25.2M → Finish32173-141#13581#13722
TOTALS9187523-6607
📊

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