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BOSTON MARATHON 2025

Chunyu Bao

Bib: 2579•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 27%
Gender (Male)
#0 / 16105
Top 40%
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
6:17/mi
19:31
↑ 97↓ 3451.5%
10K· 6.21 mi
6:16/mi
38:59
↑ 79↓ 1380.4%
15K· 9.32 mi
6:19/mi
58:36
↑ 67↓ 78
20K· 12.43 mi
6:36/mi
1:19:07
↑ 106↓ 860.1%
Half· 13.11 mi
6:43/mi
1:23:42
↑ 19↓ 370.5%
25K· 15.53 mi
7:11/mi
1:41:06
↑ 66↓ 880.2%
30K· 18.64 mi
7:58/mi
2:05:50
↑ 181↓ 1480.2%
20M
8:48/mi
2:17:47
↑ 64↓ 500.2%
21M
9:37/mi
2:27:24
↑ 106↓ 241.6%
35K· 21.75 mi
7:42/mi
2:33:10
↑ 17↓ 861.7%
23M
8:28/mi
2:43:46
↑ 23↓ 630.6%
24M
8:40/mi
2:52:26
↓ 821.3%
40K· 24.85 mi
8:54/mi
3:00:03
↓ 200.3%
25.2M
10:09/mi
3:03:33
↑ 13↓ 160.2%
Finish· 26.22 mi
8:35/mi
3:12:18
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:23:42
Pace6:23 /mi
2nd Half
Distance13.11 mi
Time1:48:36
Pace8:17 /mi
📊Positive Split: 29.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:3019:316:1719:31
6:17
-
10K
6.21 mi10:39:5838:596:1619:28
6:16
-0:01
15K
9.32 mi10:59:3558:366:1719:37
6:19
+0:03
20K
12.43 mi11:20:061:19:076:2220:31
6:36
+0:17
Half
13.11 mi11:24:411:23:426:234:35
6:43
+0:07
25K
15.53 mi11:42:051:41:066:3017:24
7:11
+0:28
30K
18.64 mi12:06:492:05:506:4524:44
7:58
+0:47
20M
20.00 mi12:18:462:17:476:5311:57
8:48
+0:50
21M
21.00 mi12:28:232:27:247:019:37
9:37
+0:49
35K
21.75 mi12:34:092:33:107:035:46
7:42
-1:55
23M
23.00 mi12:44:452:43:467:0710:36
8:28
+0:46
24M
24.00 mi12:53:252:52:267:118:40
8:40
+0:12
40K
24.85 mi13:01:023:00:037:157:37
8:54
+0:14
25.2M
25.20 mi13:04:323:03:337:173:30
10:09
+1:15
Finish
26.22 mi13:13:173:12:187:208:45
8:35
-1:34

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

6:16 /mi

Average Pace

7:20 /mi

Slowest Pace

10:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:41:06

53% of race

Time at Steady Pace

41:06

21% of race

Time at Slower Pace

50:06

26% of race

Average Pace: 7:20 /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 mi10:20:3019:316:1719:31
6:17
#2336
10K
6.21 mi10:39:5838:596:1619:28
6:16
#2257
15K
9.32 mi10:59:3558:366:1719:37
6:19
#2302
20K
12.43 mi11:20:061:19:076:2220:31
6:36
#2648
Half
13.11 mi11:24:411:23:426:234:35
6:43
#2773
25K
15.53 mi11:42:051:41:066:3017:24
7:11
#3436
30K
18.64 mi12:06:492:05:506:4524:44
7:58
#4750
20M
20.00 mi12:18:462:17:476:5311:57
8:48
#5666
21M
21.00 mi12:28:232:27:247:019:37
9:37
#6206
35K
21.75 mi12:34:092:33:107:035:46
7:42
#6276
23M
23.00 mi12:44:452:43:467:0710:36
8:28
#6535
24M
24.00 mi12:53:252:52:267:118:40
8:40
#6900
40K
24.85 mi13:01:023:00:037:157:37
8:54
#7179
25.2M
25.20 mi13:04:323:03:337:173:30
10:09
#7338
Finish
26.22 mi13:13:173:12:187:208:45
8:35
#7687
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2336223022302432(Top 9%)2322(Top 14%)2322(Top 41%)
10K6.21 mi3.10 mi2257+792155+752155+752213(Top 8%)2116(Top 13%)2116(Top 38%)
15K9.32 mi3.11 mi2302-452198-432198-432432(Top 9%)2322(Top 14%)2322(Top 41%)
20K12.43 mi3.11 mi2648-3462527-3292527-3293729(Top 13%)3522(Top 22%)3522(Top 62%)
Half13.11 mi0.68 mi2773-1252645-1182645-1185489(Top 19%)5044(Top 31%)5044(Top 89%)
25K15.53 mi2.42 mi3436-6633260-6153260-6157428(Top 26%)6399(Top 40%)6399(Top 113%)
30K18.64 mi3.11 mi4750-13144402-11424402-114211088(Top 39%)8223(Top 51%)8223(Top 146%)
20M20.00 mi1.36 mi5666-9165166-7645166-76415601(Top 55%)10193(Top 63%)10193(Top 181%)
21M21.00 mi1.00 mi6206-5405569-4035569-40316592(Top 58%)10510(Top 65%)10510(Top 186%)
35K21.75 mi0.75 mi6276-705615-465615-4610088(Top 36%)7398(Top 46%)7398(Top 131%)
23M23.00 mi1.25 mi6535-2595771-1565771-15613062(Top 46%)8713(Top 54%)8713(Top 154%)
24M24.00 mi1.00 mi6900-3656001-2306001-23015504(Top 55%)9808(Top 61%)9808(Top 174%)
40K24.85 mi0.85 mi7179-2796155-1546155-15415756(Top 55%)9784(Top 61%)9784(Top 173%)
25.2M25.20 mi0.35 mi7338-1596245-906245-9017588(Top 62%)10611(Top 66%)10611(Top 188%)
Finish26.22 mi1.02 mi7687-3496432-1876432-18716729(Top 59%)10256(Top 64%)10256(Top 182%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 9%
×21story building
+97ft-345ft

Overall

2432

Males

2322

M18-39

2322

5K→10K

3.1 - 6.2 mi

Top 8%
×5story building
+79ft-138ft

Overall

2213

Males

2116

M18-39

2116

10K→15K

6.2 - 9.3 mi

Top 9%
×3story building
+67ft-78ft

Overall

2432

Males

2322

M18-39

2322

15K→20K

9.3 - 12.4 mi

Top 13%
×5story building
+106ft-86ft

Overall

3729

Males

3522

M18-39

3522

20K→Half

12.4 - 13.1 mi

Top 19%
×2story building
+19ft-37ft

Overall

5489

Males

5044

M18-39

5044

Half→25K

13.1 - 15.5 mi

Top 26%
×4story building
+66ft-88ft

Overall

7428

Males

6399

M18-39

6399

25K→30K

15.5 - 18.6 mi

Top 39%
×9story building
+181ft-148ft

Overall

11088

Males

8223

M18-39

8223

30K→20M

18.6 - 20.0 mi

Top 55%
×5story building
+64ft-50ft

Overall

15601

Males

10193

M18-39

10193

20M→21M

20.0 - 21.0 mi

Top 58%
×8story building
+106ft-24ft

Overall

16592

Males

10510

M18-39

10510

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

10088

Males

7398

M18-39

7398

35K→23M

21.8 - 23.0 mi

Top 46%
×5story building
+23ft-63ft

Overall

13062

Males

8713

M18-39

8713

23M→24M

23.0 - 24.0 mi

Top 55%
×6story building
+12ft-82ft

Overall

15504

Males

9808

M18-39

9808

24M→40K

24.0 - 24.9 mi

Top 55%
×1story
+6ft-20ft

Overall

15756

Males

9784

M18-39

9784

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

17588

Males

10611

M18-39

10611

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2story building
+22ft-21ft

Overall

16729

Males

10256

M18-39

10256

Passing Analysis

Category:
Athletes Passed
359
Passed By
5710
Net Change
-5351
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2336
5K → 10K15576+79#2336#2257
10K → 15K57102-45#2257#2302
15K → 20K14360-346#2302#2648
20K → Half1126-125#2648#2773
Half → 25K7670-663#2773#3436
25K → 30K101324-1314#3436#4750
30K → 20M5921-916#4750#5666
20M → 21M6546-540#5666#6206
21M → 35K2696-70#6206#6276
35K → 23M33292-259#6276#6535
23M → 24M19384-365#6535#6900
24M → 40K13292-279#6900#7179
40K → 25.2M5164-159#7179#7338
25.2M → Finish8357-349#7338#7687
TOTALS3595710-5351
📊

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