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BOSTON MARATHON 2025

Zachary Bailey

Bib: 8509•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 25%
Gender (Male)
#0 / 16105
Top 37%
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
6:25/mi
19:57
↑ 97↓ 3451.5%
10K· 6.21 mi
6:53/mi
41:20
↑ 79↓ 1380.4%
15K· 9.32 mi
6:59/mi
1:03:03
↑ 67↓ 78
20K· 12.43 mi
7:09/mi
1:25:15
↑ 106↓ 860.1%
Half· 13.11 mi
7:01/mi
1:30:02
↑ 19↓ 370.5%
25K· 15.53 mi
7:11/mi
1:47:28
↑ 66↓ 880.2%
30K· 18.64 mi
7:38/mi
2:11:11
↑ 181↓ 1480.2%
20M
7:42/mi
2:21:39
↑ 64↓ 500.2%
21M
7:55/mi
2:29:34
↑ 106↓ 241.6%
35K· 21.75 mi
7:12/mi
2:34:57
↑ 17↓ 861.7%
23M
7:46/mi
2:44:41
↑ 23↓ 630.6%
24M
7:48/mi
2:52:29
↓ 821.3%
40K· 24.85 mi
7:55/mi
2:59:15
↓ 200.3%
25.2M
8:27/mi
3:02:10
↑ 13↓ 160.2%
Finish· 26.22 mi
7:26/mi
3:09:44
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:30:02
Pace6:52 /mi
2nd Half
Distance13.11 mi
Time1:39:42
Pace7:36 /mi
📊Positive Split: 10.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:10:1919:576:2519:57
6:25
-
10K
6.21 mi11:31:4241:206:3921:23
6:53
+0:28
15K
9.32 mi11:53:251:03:036:4621:43
6:59
+0:06
20K
12.43 mi12:15:371:25:156:5222:12
7:09
+0:10
Half
13.11 mi12:20:241:30:026:524:47
7:01
-0:08
25K
15.53 mi12:37:501:47:286:5517:26
7:11
+0:10
30K
18.64 mi13:01:332:11:117:0223:43
7:38
+0:27
20M
20.00 mi13:12:012:21:397:0510:28
7:42
+0:04
21M
21.00 mi13:19:562:29:347:077:55
7:55
+0:13
35K
21.75 mi13:25:192:34:577:075:23
7:12
-0:43
23M
23.00 mi13:35:032:44:417:109:44
7:46
+0:34
24M
24.00 mi13:42:512:52:297:117:48
7:48
+0:02
40K
24.85 mi13:49:372:59:157:136:46
7:55
+0:07
25.2M
25.20 mi13:52:323:02:107:142:55
8:27
+0:32
Finish
26.22 mi14:00:063:09:447:157:34
7:26
-1:01

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

6:25 /mi

Average Pace

7:15 /mi

Slowest Pace

8:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:30:02

47% of race

Time at Steady Pace

54:06

29% of race

Time at Slower Pace

45:36

24% of race

Average Pace: 7:14 /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 mi11:10:1919:576:2519:57
6:25
#3271
10K
6.21 mi11:31:4241:206:3921:23
6:53
#4944
15K
9.32 mi11:53:251:03:036:4621:43
6:59
#5862
20K
12.43 mi12:15:371:25:156:5222:12
7:09
#6497
Half
13.11 mi12:20:241:30:026:524:47
7:01
#6571
25K
15.53 mi12:37:501:47:286:5517:26
7:11
#6710
30K
18.64 mi13:01:332:11:117:0223:43
7:38
#6902
20M
20.00 mi13:12:012:21:397:0510:28
7:42
#6936
21M
21.00 mi13:19:562:29:347:077:55
7:55
#6842
35K
21.75 mi13:25:192:34:577:075:23
7:12
#6785
23M
23.00 mi13:35:032:44:417:109:44
7:46
#6828
24M
24.00 mi13:42:512:52:297:117:48
7:48
#6911
40K
24.85 mi13:49:372:59:157:136:46
7:55
#6950
25.2M
25.20 mi13:52:323:02:107:142:55
8:27
#6963
Finish
26.22 mi14:00:063:09:447:157:34
7:26
#6977
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3271310631067552(Top 27%)6646(Top 41%)6646(Top 118%)
10K6.21 mi3.10 mi4944-16734612-15064612-15067099(Top 25%)6351(Top 39%)6351(Top 113%)
15K9.32 mi3.11 mi5862-9185380-7685380-7687552(Top 27%)6646(Top 41%)6646(Top 118%)
20K12.43 mi3.11 mi6497-6355877-4975877-4977773(Top 27%)6727(Top 42%)6727(Top 119%)
Half13.11 mi0.68 mi6571-745935-585935-587613(Top 27%)6634(Top 41%)6634(Top 118%)
25K15.53 mi2.42 mi6710-1396029-946029-947520(Top 26%)6450(Top 40%)6450(Top 114%)
30K18.64 mi3.11 mi6902-1926133-1046133-1048680(Top 31%)6969(Top 43%)6969(Top 124%)
20M20.00 mi1.36 mi6936-346131+26131+28330(Top 29%)6623(Top 41%)6623(Top 117%)
21M21.00 mi1.00 mi6842+946040+916040+916856(Top 24%)5590(Top 35%)5590(Top 99%)
35K21.75 mi0.75 mi6785+575987+535987+536532(Top 23%)5398(Top 34%)5398(Top 96%)
23M23.00 mi1.25 mi6828-435976+115976+118370(Top 29%)6366(Top 40%)6366(Top 113%)
24M24.00 mi1.00 mi6911-836008-326008-329760(Top 34%)7031(Top 44%)7031(Top 125%)
40K24.85 mi0.85 mi6950-396006+26006+29511(Top 33%)6785(Top 42%)6785(Top 120%)
25.2M25.20 mi0.35 mi6963-136002+46002+48446(Top 30%)6131(Top 38%)6131(Top 109%)
Finish26.22 mi1.02 mi6977-145978+245978+248639(Top 30%)6245(Top 39%)6245(Top 111%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 27%
×21story building
+97ft-345ft

Overall

7552

Males

6646

M18-39

6646

5K→10K

3.1 - 6.2 mi

Top 25%
×5story building
+79ft-138ft

Overall

7099

Males

6351

M18-39

6351

10K→15K

6.2 - 9.3 mi

Top 27%
×3story building
+67ft-78ft

Overall

7552

Males

6646

M18-39

6646

15K→20K

9.3 - 12.4 mi

Top 27%
×5story building
+106ft-86ft

Overall

7773

Males

6727

M18-39

6727

20K→Half

12.4 - 13.1 mi

Top 27%
×2story building
+19ft-37ft

Overall

7613

Males

6634

M18-39

6634

Half→25K

13.1 - 15.5 mi

Top 26%
×4story building
+66ft-88ft

Overall

7520

Males

6450

M18-39

6450

25K→30K

15.5 - 18.6 mi

Top 31%
×9story building
+181ft-148ft

Overall

8680

Males

6969

M18-39

6969

30K→20M

18.6 - 20.0 mi

Top 29%
×5story building
+64ft-50ft

Overall

8330

Males

6623

M18-39

6623

20M→21M

20.0 - 21.0 mi

Top 24%
×8story building
+106ft-24ft

Overall

6856

Males

5590

M18-39

5590

21M→35K

21.0 - 21.8 mi

Top 23%
×7story building
+17ft-86ft

Overall

6532

Males

5398

M18-39

5398

35K→23M

21.8 - 23.0 mi

Top 29%
×5story building
+23ft-63ft

Overall

8370

Males

6366

M18-39

6366

23M→24M

23.0 - 24.0 mi

Top 34%
×6story building
+12ft-82ft

Overall

9760

Males

7031

M18-39

7031

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

9511

Males

6785

M18-39

6785

40K→25.2M

24.9 - 25.2 mi

Top 30%
×1story
+13ft-16ft

Overall

8446

Males

6131

M18-39

6131

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2story building
+22ft-21ft

Overall

8639

Males

6245

M18-39

6245

Passing Analysis

Category:
Athletes Passed
828
Passed By
4534
Net Change
-3706
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3271
5K → 10K01673-1673#3271#4944
10K → 15K18936-918#4944#5862
15K → 20K42677-635#5862#6497
20K → Half781-74#6497#6571
Half → 25K84223-139#6571#6710
25K → 30K114306-192#6710#6902
30K → 20M84118-34#6902#6936
20M → 21M13844+94#6936#6842
21M → 35K7316+57#6842#6785
35K → 23M84127-43#6785#6828
23M → 24M52135-83#6828#6911
24M → 40K4584-39#6911#6950
40K → 25.2M2336-13#6950#6963
25.2M → Finish6478-14#6963#6977
TOTALS8284534-3706
📊

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