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BOSTON MARATHON 2025

David Lee

Bib: 2656•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 29%
Gender (Male)
#0 / 16105
Top 42%
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
6:58/mi
21:39
↑ 97↓ 3451.5%
10K· 6.21 mi
7:05/mi
43:38
↑ 79↓ 1380.4%
15K· 9.32 mi
7:04/mi
1:05:36
↑ 67↓ 78
20K· 12.43 mi
7:10/mi
1:27:51
↑ 106↓ 860.1%
Half· 13.11 mi
7:11/mi
1:32:45
↑ 19↓ 370.5%
25K· 15.53 mi
7:19/mi
1:50:29
↑ 66↓ 880.2%
30K· 18.64 mi
7:43/mi
2:14:29
↑ 181↓ 1480.2%
20M
7:49/mi
2:25:07
↑ 64↓ 500.2%
21M
8:27/mi
2:33:34
↑ 106↓ 241.6%
35K· 21.75 mi
7:33/mi
2:39:13
↑ 17↓ 861.7%
23M
7:55/mi
2:49:08
↑ 23↓ 630.6%
24M
7:56/mi
2:57:04
↓ 821.3%
40K· 24.85 mi
8:05/mi
3:03:59
↓ 200.3%
25.2M
8:45/mi
3:07:00
↑ 13↓ 160.2%
Finish· 26.22 mi
7:08/mi
3:14:16
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:32:45
Pace7:04 /mi
2nd Half
Distance13.11 mi
Time1:41:31
Pace7:45 /mi
📊Positive Split: 9.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:5421:396:5821:39
6:58
-
10K
6.21 mi10:44:5343:387:0121:59
7:05
+0:07
15K
9.32 mi11:06:511:05:367:0221:58
7:04
-0:01
20K
12.43 mi11:29:061:27:517:0422:15
7:10
+0:06
Half
13.11 mi11:34:001:32:457:044:54
7:11
+0:01
25K
15.53 mi11:51:441:50:297:0717:44
7:19
+0:08
30K
18.64 mi12:15:442:14:297:1324:00
7:43
+0:24
20M
20.00 mi12:26:222:25:077:1510:38
7:49
+0:06
21M
21.00 mi12:34:492:33:347:198:27
8:27
+0:38
35K
21.75 mi12:40:282:39:137:195:39
7:33
-0:54
23M
23.00 mi12:50:232:49:087:219:55
7:55
+0:22
24M
24.00 mi12:58:192:57:047:237:56
7:56
+0:01
40K
24.85 mi13:05:143:03:597:246:55
8:05
+0:09
25.2M
25.20 mi13:08:153:07:007:253:01
8:45
+0:40
Finish
26.22 mi13:15:313:14:167:257:16
7:08
-1:37

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

6:58 /mi

Average Pace

7:25 /mi

Slowest Pace

8:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:40:01

51% of race

Time at Steady Pace

47:23

24% of race

Time at Slower Pace

46:52

24% of race

Average Pace: 7:25 /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 mi10:22:5421:396:5821:39
6:58
#7569
10K
6.21 mi10:44:5343:387:0121:59
7:05
#8026
15K
9.32 mi11:06:511:05:367:0221:58
7:04
#8027
20K
12.43 mi11:29:061:27:517:0422:15
7:10
#7956
Half
13.11 mi11:34:001:32:457:044:54
7:11
#7993
25K
15.53 mi11:51:441:50:297:0717:44
7:19
#8011
30K
18.64 mi12:15:442:14:297:1324:00
7:43
#8141
20M
20.00 mi12:26:222:25:077:1510:38
7:49
#8179
21M
21.00 mi12:34:492:33:347:198:27
8:27
#8234
35K
21.75 mi12:40:282:39:137:195:39
7:33
#8238
23M
23.00 mi12:50:232:49:087:219:55
7:55
#8253
24M
24.00 mi12:58:192:57:047:237:56
7:56
#8313
40K
24.85 mi13:05:143:03:597:246:55
8:05
#8380
25.2M
25.20 mi13:08:153:07:007:253:01
8:45
#8400
Finish
26.22 mi13:15:313:14:167:257:16
7:08
#8314
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi7569672467248120(Top 29%)7018(Top 44%)7018(Top 124%)
10K6.21 mi3.10 mi8026-4577002-2787002-2788462(Top 30%)7271(Top 45%)7271(Top 129%)
15K9.32 mi3.11 mi8027-16993+96993+98120(Top 29%)7018(Top 44%)7018(Top 124%)
20K12.43 mi3.11 mi7956+716924+696924+697900(Top 28%)6807(Top 42%)6807(Top 121%)
Half13.11 mi0.68 mi7993-376949-256949-258881(Top 31%)7403(Top 46%)7403(Top 131%)
25K15.53 mi2.42 mi8011-186934+156934+158451(Top 30%)7031(Top 44%)7031(Top 125%)
30K18.64 mi3.11 mi8141-1306956-226956-229347(Top 33%)7338(Top 46%)7338(Top 130%)
20M20.00 mi1.36 mi8179-38695669569171(Top 32%)7082(Top 44%)7082(Top 126%)
21M21.00 mi1.00 mi8234-556954+26954+210128(Top 36%)7425(Top 46%)7425(Top 132%)
35K21.75 mi0.75 mi8238-46936+186936+188974(Top 32%)6836(Top 42%)6836(Top 121%)
23M23.00 mi1.25 mi8253-156903+336903+339418(Top 33%)6928(Top 43%)6928(Top 123%)
24M24.00 mi1.00 mi8313-606901+26901+210741(Top 38%)7545(Top 47%)7545(Top 134%)
40K24.85 mi0.85 mi8380-676908-76908-710747(Top 38%)7425(Top 46%)7425(Top 132%)
25.2M25.20 mi0.35 mi8400-206898+106898+1010213(Top 36%)7037(Top 44%)7037(Top 125%)
Finish26.22 mi1.02 mi8314+866817+816817+816566(Top 23%)5078(Top 32%)5078(Top 90%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21story building
+97ft-345ft

Overall

8120

Males

7018

M18-39

7018

5K→10K

3.1 - 6.2 mi

Top 30%
×5story building
+79ft-138ft

Overall

8462

Males

7271

M18-39

7271

10K→15K

6.2 - 9.3 mi

Top 29%
×3story building
+67ft-78ft

Overall

8120

Males

7018

M18-39

7018

15K→20K

9.3 - 12.4 mi

Top 28%
×5story building
+106ft-86ft

Overall

7900

Males

6807

M18-39

6807

20K→Half

12.4 - 13.1 mi

Top 31%
×2story building
+19ft-37ft

Overall

8881

Males

7403

M18-39

7403

Half→25K

13.1 - 15.5 mi

Top 30%
×4story building
+66ft-88ft

Overall

8451

Males

7031

M18-39

7031

25K→30K

15.5 - 18.6 mi

Top 33%
×9story building
+181ft-148ft

Overall

9347

Males

7338

M18-39

7338

30K→20M

18.6 - 20.0 mi

Top 32%
×5story building
+64ft-50ft

Overall

9171

Males

7082

M18-39

7082

20M→21M

20.0 - 21.0 mi

Top 36%
×8story building
+106ft-24ft

Overall

10128

Males

7425

M18-39

7425

21M→35K

21.0 - 21.8 mi

Top 32%
×7story building
+17ft-86ft

Overall

8974

Males

6836

M18-39

6836

35K→23M

21.8 - 23.0 mi

Top 33%
×5story building
+23ft-63ft

Overall

9418

Males

6928

M18-39

6928

23M→24M

23.0 - 24.0 mi

Top 38%
×6story building
+12ft-82ft

Overall

10741

Males

7545

M18-39

7545

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10747

Males

7425

M18-39

7425

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

10213

Males

7037

M18-39

7037

25.2M→Finish

25.2 - 26.2 mi

Top 23%
×2story building
+22ft-21ft

Overall

6566

Males

5078

M18-39

5078

Passing Analysis

Category:
Athletes Passed
1280
Passed By
2025
Net Change
-745
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7569
5K → 10K72529-457#7569#8026
10K → 15K140141-1#8026#8027
15K → 20K175104+71#8027#7956
20K → Half1855-37#7956#7993
Half → 25K120138-18#7993#8011
25K → 30K150280-130#8011#8141
30K → 20M96134-38#8141#8179
20M → 21M81136-55#8179#8234
21M → 35K5862-4#8234#8238
35K → 23M103118-15#8238#8253
23M → 24M62122-60#8253#8313
24M → 40K52119-67#8313#8380
40K → 25.2M3555-20#8380#8400
25.2M → Finish11832+86#8400#8314
TOTALS12802025-745
📊

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