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BOSTON MARATHON 2025

Alessandro Pacini

Bib: 12118•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 37%
Gender (Male)
#0 / 16105
Top 50%
Masters (Masters Men)
#0 / 10463
Top 39%
Division (M55-59)
#0 / 1648
Top 21%
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
7:05/mi
22:00
↑ 97↓ 3451.5%
10K· 6.21 mi
7:04/mi
43:58
↑ 79↓ 1380.4%
15K· 9.32 mi
7:18/mi
1:06:40
↑ 67↓ 78
20K· 12.43 mi
7:33/mi
1:30:07
↑ 106↓ 860.1%
Half· 13.11 mi
7:26/mi
1:35:11
↑ 19↓ 370.5%
25K· 15.53 mi
7:45/mi
1:53:58
↑ 66↓ 880.2%
30K· 18.64 mi
8:00/mi
2:18:49
↑ 181↓ 1480.2%
20M
8:08/mi
2:29:52
↑ 64↓ 500.2%
21M
8:46/mi
2:38:38
↑ 106↓ 241.6%
35K· 21.75 mi
7:45/mi
2:44:26
↑ 17↓ 861.7%
23M
8:14/mi
2:54:44
↑ 23↓ 630.6%
24M
7:59/mi
3:02:43
↓ 821.3%
40K· 24.85 mi
8:10/mi
3:09:42
↓ 200.3%
25.2M
9:11/mi
3:12:52
↑ 13↓ 160.2%
Finish· 26.22 mi
8:00/mi
3:21:01
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:11
Pace7:16 /mi
2nd Half
Distance13.11 mi
Time1:45:50
Pace8:04 /mi
📊Positive Split: 11.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:2622:007:0522:00
7:05
-
10K
6.21 mi11:11:2443:587:0521:58
7:04
-0:01
15K
9.32 mi11:34:061:06:407:0922:42
7:18
+0:14
20K
12.43 mi11:57:331:30:077:1523:27
7:33
+0:15
Half
13.11 mi12:02:371:35:117:165:04
7:26
-0:07
25K
15.53 mi12:21:241:53:587:2018:47
7:45
+0:19
30K
18.64 mi12:46:152:18:497:2724:51
8:00
+0:15
20M
20.00 mi12:57:182:29:527:3011:03
8:08
+0:08
21M
21.00 mi13:06:042:38:387:338:46
8:46
+0:38
35K
21.75 mi13:11:522:44:267:345:48
7:45
-1:01
23M
23.00 mi13:22:102:54:447:3610:18
8:14
+0:29
24M
24.00 mi13:30:093:02:437:377:59
7:59
-0:15
40K
24.85 mi13:37:083:09:427:386:59
8:10
+0:11
25.2M
25.20 mi13:40:183:12:527:393:10
9:11
+1:01
Finish
26.22 mi13:48:273:21:017:408:09
8:00
-1:11

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

7:04 /mi

Average Pace

7:40 /mi

Slowest Pace

9:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:35:11

47% of race

Time at Steady Pace

1:33:54

47% of race

Time at Slower Pace

11:56

6% of race

Average Pace: 7:40 /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 mi10:49:2622:007:0522:00
7:05
#8469
10K
6.21 mi11:11:2443:587:0521:58
7:04
#8470
15K
9.32 mi11:34:061:06:407:0922:42
7:18
#8931
20K
12.43 mi11:57:331:30:077:1523:27
7:33
#9425
Half
13.11 mi12:02:371:35:117:165:04
7:26
#9507
25K
15.53 mi12:21:241:53:587:2018:47
7:45
#9878
30K
18.64 mi12:46:152:18:497:2724:51
8:00
#10113
20M
20.00 mi12:57:182:29:527:3011:03
8:08
#10186
21M
21.00 mi13:06:042:38:387:338:46
8:46
#10268
35K
21.75 mi13:11:522:44:267:345:48
7:45
#10276
23M
23.00 mi13:22:102:54:447:3610:18
8:14
#10322
24M
24.00 mi13:30:093:02:437:377:59
7:59
#10336
40K
24.85 mi13:37:083:09:427:386:59
8:10
#10338
25.2M
25.20 mi13:40:183:12:527:393:10
9:11
#10375
Finish
26.22 mi13:48:273:21:017:408:09
8:00
#10436
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi84697299729910036(Top 35%)8104(Top 50%)8104(Top 492%)
10K6.21 mi3.10 mi8470-17281+187281+188420(Top 30%)7244(Top 45%)7244(Top 440%)
15K9.32 mi3.11 mi8931-4617543-2627543-26210036(Top 35%)8104(Top 50%)8104(Top 492%)
20K12.43 mi3.11 mi9425-4947793-2507793-25011132(Top 39%)8555(Top 53%)8555(Top 519%)
Half13.11 mi0.68 mi9507-827833-407833-4011045(Top 39%)8561(Top 53%)8561(Top 519%)
25K15.53 mi2.42 mi9878-3718001-1688001-16811899(Top 42%)8794(Top 55%)8794(Top 534%)
30K18.64 mi3.11 mi10113-2358068-678068-6711351(Top 40%)8362(Top 52%)8362(Top 507%)
20M20.00 mi1.36 mi10186-738082-148082-1411304(Top 40%)8183(Top 51%)8183(Top 497%)
21M21.00 mi1.00 mi10268-828066+168066+1612056(Top 42%)8392(Top 52%)8392(Top 509%)
35K21.75 mi0.75 mi10276-88050+168050+1610432(Top 37%)7586(Top 47%)7586(Top 460%)
23M23.00 mi1.25 mi10322-468023+278023+2711498(Top 40%)7982(Top 50%)7982(Top 484%)
24M24.00 mi1.00 mi10336-148004+198004+1911094(Top 39%)7718(Top 48%)7718(Top 468%)
40K24.85 mi0.85 mi10338-27969+357969+3511339(Top 40%)7730(Top 48%)7730(Top 469%)
25.2M25.20 mi0.35 mi10375-377970-17970-112738(Top 45%)8323(Top 52%)8323(Top 505%)
Finish26.22 mi1.02 mi10436-617975-57975-512832(Top 45%)8445(Top 52%)8445(Top 512%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21story building
+97ft-345ft

Overall

10036

Males

8104

M55-59

8104

5K→10K

3.1 - 6.2 mi

Top 30%
×5story building
+79ft-138ft

Overall

8420

Males

7244

M55-59

7244

10K→15K

6.2 - 9.3 mi

Top 35%
×3story building
+67ft-78ft

Overall

10036

Males

8104

M55-59

8104

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

11132

Males

8555

M55-59

8555

20K→Half

12.4 - 13.1 mi

Top 39%
×2story building
+19ft-37ft

Overall

11045

Males

8561

M55-59

8561

Half→25K

13.1 - 15.5 mi

Top 42%
×4story building
+66ft-88ft

Overall

11899

Males

8794

M55-59

8794

25K→30K

15.5 - 18.6 mi

Top 40%
×9story building
+181ft-148ft

Overall

11351

Males

8362

M55-59

8362

30K→20M

18.6 - 20.0 mi

Top 40%
×5story building
+64ft-50ft

Overall

11304

Males

8183

M55-59

8183

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

12056

Males

8392

M55-59

8392

21M→35K

21.0 - 21.8 mi

Top 37%
×7story building
+17ft-86ft

Overall

10432

Males

7586

M55-59

7586

35K→23M

21.8 - 23.0 mi

Top 40%
×5story building
+23ft-63ft

Overall

11498

Males

7982

M55-59

7982

23M→24M

23.0 - 24.0 mi

Top 39%
×6story building
+12ft-82ft

Overall

11094

Males

7718

M55-59

7718

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

11339

Males

7730

M55-59

7730

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12738

Males

8323

M55-59

8323

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2story building
+22ft-21ft

Overall

12832

Males

8445

M55-59

8445

Passing Analysis

Category:
Athletes Passed
1135
Passed By
3100
Net Change
-1967
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8469
5K → 10K208209-1#8469#8470
10K → 15K55516-461#8470#8931
15K → 20K68562-494#8931#9425
20K → Half1294-82#9425#9507
Half → 25K71442-371#9507#9878
25K → 30K161394-235#9878#10113
30K → 20M96169-73#10113#10186
20M → 21M80162-82#10186#10268
21M → 35K5664-8#10268#10276
35K → 23M98144-46#10276#10322
23M → 24M7084-14#10322#10336
24M → 40K8385-2#10336#10338
40K → 25.2M2360-37#10338#10375
25.2M → Finish54115-61#10375#10436
TOTALS11353100-1967
📊

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