Boston Marathon logo
BOSTON MARATHON 2025

Isaias Sanchez Lopez

Bib: 31627•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
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
11:34/mi
35:56
↑ 97↓ 3451.5%
10K· 6.21 mi
11:53/mi
1:12:52
↑ 79↓ 1380.4%
15K· 9.32 mi
11:47/mi
1:49:30
↑ 67↓ 78
20K· 12.43 mi
12:25/mi
2:28:05
↑ 106↓ 860.1%
Half· 13.11 mi
10:45/mi
2:35:25
↑ 19↓ 370.5%
25K· 15.53 mi
11:55/mi
3:04:18
↑ 66↓ 880.2%
30K· 18.64 mi
12:12/mi
3:42:11
↑ 181↓ 1480.2%
20M
12:42/mi
3:59:27
↑ 64↓ 500.2%
21M
13:55/mi
4:13:22
↑ 106↓ 241.6%
35K· 21.75 mi
11:30/mi
4:21:58
↑ 17↓ 861.7%
23M
11:52/mi
4:36:50
↑ 23↓ 630.6%
24M
11:30/mi
4:48:20
↓ 821.3%
40K· 24.85 mi
11:30/mi
4:58:10
↓ 200.3%
25.2M
13:32/mi
5:02:50
↑ 13↓ 160.2%
Finish· 26.22 mi
11:10/mi
5:14:13
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:35:25
Pace11:51 /mi
2nd Half
Distance13.11 mi
Time2:38:48
Pace12:07 /mi
📊Positive Split: 2.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi12:00:0235:5611:3435:56
11:34
-
10K
6.21 mi12:36:581:12:5211:4436:56
11:53
+0:19
15K
9.32 mi13:13:361:49:3011:4536:38
11:47
-0:06
20K
12.43 mi13:52:112:28:0511:5538:35
12:25
+0:38
Half
13.11 mi13:59:312:35:2511:517:20
10:45
-1:40
25K
15.53 mi14:28:243:04:1811:5228:53
11:55
+1:10
30K
18.64 mi15:06:173:42:1111:5537:53
12:12
+0:17
20M
20.00 mi15:23:333:59:2711:5817:16
12:42
+0:30
21M
21.00 mi15:37:284:13:2212:0413:55
13:55
+1:13
35K
21.75 mi15:46:044:21:5812:038:36
11:30
-2:25
23M
23.00 mi16:00:564:36:5012:0214:52
11:52
+0:22
24M
24.00 mi16:12:264:48:2012:0111:30
11:30
-0:22
40K
24.85 mi16:22:164:58:1012:009:50
11:30
0:00
25.2M
25.20 mi16:26:565:02:5012:014:40
13:32
+2:02
Finish
26.22 mi16:38:195:14:1312:0011:23
11:10
-2:22

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

10:45 /mi

Average Pace

12:00 /mi

Slowest Pace

13:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

18:43

6% of race

Time at Steady Pace

3:41:04

70% of race

Time at Slower Pace

1:14:26

24% of race

Average Pace: 11:59 /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 mi12:00:0235:5611:3435:56
11:34
#28063
10K
6.21 mi12:36:581:12:5211:4436:56
11:53
#27973
15K
9.32 mi13:13:361:49:3011:4536:38
11:47
#27841
20K
12.43 mi13:52:112:28:0511:5538:35
12:25
#27757
Half
13.11 mi13:59:312:35:2511:517:20
10:45
#27698
25K
15.53 mi14:28:243:04:1811:5228:53
11:55
#27488
30K
18.64 mi15:06:173:42:1111:5537:53
12:12
#27220
20M
20.00 mi15:23:333:59:2711:5817:16
12:42
#27163
21M
21.00 mi15:37:284:13:2212:0413:55
13:55
#27119
35K
21.75 mi15:46:044:21:5812:038:36
11:30
#27076
23M
23.00 mi16:00:564:36:5012:0214:52
11:52
#27014
24M
24.00 mi16:12:264:48:2012:0111:30
11:30
#26948
40K
24.85 mi16:22:164:58:1012:009:50
11:30
#26863
25.2M
25.20 mi16:26:565:02:5012:014:40
13:32
#26847
Finish
26.22 mi16:38:195:14:1312:0011:23
11:10
#26818
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi28063159931599327488(Top 97%)15742(Top 98%)15742(Top 660%)
10K6.21 mi3.10 mi27973+9015958+3515958+3527880(Top 98%)15916(Top 99%)15916(Top 667%)
15K9.32 mi3.11 mi27841+13215900+5815900+5827488(Top 97%)15742(Top 98%)15742(Top 660%)
20K12.43 mi3.11 mi27757+8415858+4215858+4227464(Top 97%)15713(Top 98%)15713(Top 659%)
Half13.11 mi0.68 mi27698+5915831+2715831+2726174(Top 92%)15190(Top 94%)15190(Top 637%)
25K15.53 mi2.42 mi27488+21015741+9015741+9026355(Top 93%)15233(Top 95%)15233(Top 638%)
30K18.64 mi3.11 mi27220+26815616+12515616+12525821(Top 91%)14905(Top 93%)14905(Top 625%)
20M20.00 mi1.36 mi27163+5715595+2115595+2126153(Top 92%)14996(Top 93%)14996(Top 628%)
21M21.00 mi1.00 mi27119+4415570+2515570+2526146(Top 92%)14957(Top 93%)14957(Top 627%)
35K21.75 mi0.75 mi27076+4315547+2315547+2325098(Top 88%)14402(Top 89%)14402(Top 604%)
23M23.00 mi1.25 mi27014+6215511+3615511+3624928(Top 88%)14303(Top 89%)14303(Top 599%)
24M24.00 mi1.00 mi26948+6615482+2915482+2924880(Top 88%)14244(Top 88%)14244(Top 597%)
40K24.85 mi0.85 mi26863+8515431+5115431+5124151(Top 85%)13850(Top 86%)13850(Top 580%)
25.2M25.20 mi0.35 mi26847+1615419+1215419+1225730(Top 91%)14612(Top 91%)14612(Top 612%)
Finish26.22 mi1.02 mi26818+2915402+1715402+1725669(Top 90%)14615(Top 91%)14615(Top 613%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 97%
×21story building
+97ft-345ft

Overall

27488

Males

15742

M45-49

15742

5K→10K

3.1 - 6.2 mi

Top 98%
×5story building
+79ft-138ft

Overall

27880

Males

15916

M45-49

15916

10K→15K

6.2 - 9.3 mi

Top 97%
×3story building
+67ft-78ft

Overall

27488

Males

15742

M45-49

15742

15K→20K

9.3 - 12.4 mi

Top 97%
×5story building
+106ft-86ft

Overall

27464

Males

15713

M45-49

15713

20K→Half

12.4 - 13.1 mi

Top 92%
×2story building
+19ft-37ft

Overall

26174

Males

15190

M45-49

15190

Half→25K

13.1 - 15.5 mi

Top 93%
×4story building
+66ft-88ft

Overall

26355

Males

15233

M45-49

15233

25K→30K

15.5 - 18.6 mi

Top 91%
×9story building
+181ft-148ft

Overall

25821

Males

14905

M45-49

14905

30K→20M

18.6 - 20.0 mi

Top 92%
×5story building
+64ft-50ft

Overall

26153

Males

14996

M45-49

14996

20M→21M

20.0 - 21.0 mi

Top 92%
×8story building
+106ft-24ft

Overall

26146

Males

14957

M45-49

14957

21M→35K

21.0 - 21.8 mi

Top 88%
×7story building
+17ft-86ft

Overall

25098

Males

14402

M45-49

14402

35K→23M

21.8 - 23.0 mi

Top 88%
×5story building
+23ft-63ft

Overall

24928

Males

14303

M45-49

14303

23M→24M

23.0 - 24.0 mi

Top 88%
×6story building
+12ft-82ft

Overall

24880

Males

14244

M45-49

14244

24M→40K

24.0 - 24.9 mi

Top 85%
×1story
+6ft-20ft

Overall

24151

Males

13850

M45-49

13850

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

25730

Males

14612

M45-49

14612

25.2M→Finish

25.2 - 26.2 mi

Top 90%
×2story building
+22ft-21ft

Overall

25669

Males

14615

M45-49

14615

Passing Analysis

Category:
Athletes Passed
1355
Passed By
110
Net Change
+1245
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#28063
5K → 10K12838+90#28063#27973
10K → 15K14715+132#27973#27841
15K → 20K10319+84#27841#27757
20K → Half623+59#27757#27698
Half → 25K2133+210#27698#27488
25K → 30K2724+268#27488#27220
30K → 20M647+57#27220#27163
20M → 21M495+44#27163#27119
21M → 35K430+43#27119#27076
35K → 23M631+62#27076#27014
23M → 24M682+66#27014#26948
24M → 40K872+85#26948#26863
40K → 25.2M182+16#26863#26847
25.2M → Finish389+29#26847#26818
TOTALS1355110+1245
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing