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SF MARATHON 1ST HALF 2026

Louis Alonzo

Fontana, CA

Bib: 13248 M 29

0:00
0:00
/ mi
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Overall
#0 / 6575
Top 9%
Gender (Male)
#0 / 3619
Top 14%
Division (M25-29)
#0 / 796
Top 14%
Race Day Weather
59°/49°F
scattered clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
10 ft elev
2M
8:02/mi
16:04
→ flat
12 ft elev
4M
8:18/mi
32:40
↑ 67↓ 69
10 ft elev
6M
8:28/mi
49:37
↑ 1231.1%
126 ft elev
8M
9:14/mi
1:08:05
↑ 166↓ 531.1%
246 ft elev
9.6M
6:22/mi
1:18:17
↑ 68↓ 1931.5%
126 ft elev
10M
14:26/mi
1:24:03
↓ 241.1%
90 ft elev
10.5M
3:50/mi
1:25:58
↓ 732.7%
18 ft elev
12M
11:25/mi
1:43:05
↑ 2803.2%
272 ft elev
Finish· 13.11 mi
7:53/mi
1:51:50
↑ 14↓ 891.3%
205 ft elev
Course Elevation
10–277 ft
≈
×22story building
•▲ 774 ft climb · ▼ 557 ft descent

The Course

Half Splits

1st Half· via 6M
49:378:16 /mi⚡ faster
2nd Half
1:02:138:45 /mi+25.4%
Positive split — 25.4% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
2M
2.00 mi07:01:5616:048:0216:04
8:02
-
4M
4.00 mi07:18:3232:408:1016:36
8:18
+0:16
6M
6.00 mi07:35:2949:378:1616:57
8:28
+0:10
8M
8.00 mi07:53:571:08:058:3118:28
9:14
+0:46
9.6M
9.60 mi08:04:091:18:178:0910:12
6:22
-2:52
10M
10.00 mi08:09:551:24:038:245:46
14:26
+8:04
10.5M
10.50 mi08:11:501:25:588:111:55
3:50
-10:36
12M
12.00 mi08:28:571:43:058:3517:07
11:25
+7:35
Finish
13.11 mi08:37:421:51:508:328:45
7:53
-3:32

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

3:50 /mi

Average Pace

8:32 /mi

Slowest Pace

14:26 /mi

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Fastest
Middle
Slowest
Average

Segments

Segment Time Comparison

Time at Faster Pace

12:07

11% of race

Time at Steady Pace

1:16:50

69% of race

Time at Slower Pace

22:53

20% of race

Average Pace: 8:32 /mi

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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.

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0mi3.3mi6.6mi9.8mi13.1mi
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
2M
2.00 mi07:01:5616:048:0216:04
8:02
#514
4M
4.00 mi07:18:3232:408:1016:36
8:18
#580
6M
6.00 mi07:35:2949:378:1616:57
8:28
#640
8M
8.00 mi07:53:571:08:058:3118:28
9:14
#797
9.6M
9.60 mi08:04:091:18:178:0910:12
6:22
#636
10M
10.00 mi08:09:551:24:038:245:46
14:26
#619
10.5M
10.50 mi08:11:501:25:588:111:55
3:50
#614
12M
12.00 mi08:28:571:43:058:3517:07
11:25
#617
Finish
13.11 mi08:37:421:51:508:328:45
7:53
#585
Faster pace
Steady pace
Slower pace
Featured Segment

Garmin Challenge

Top 7%
Garmin Challenge
Course map with the garmin challenge highlighted
Garmin Challenge · 9.6–10.5 mi · © Mapbox © OpenStreetMap

7:41

Segment Time

8:32/mi

Pace

0.90 mi

Distance

Overall

434

Men

368

Division

93

See the full Garmin Challenge leaderboard

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM25-29Seg. OverallSeg. MalesSeg. M25-29
2M2.00 mi2.00 mi51443092855675157
4M4.00 mi2.00 mi580-66492-62114-22666554133
6M6.00 mi2.00 mi640-60531-39127-13826676163
8M8.00 mi2.00 mi797-157657-126160-3314951151271
9.6M9.60 mi1.60 mi636+161528+129123+3729923656
10M10.00 mi0.40 mi619+17515+13123530426105
10.5M10.50 mi0.50 mi614+5510+5122+139534188
12M12.00 mi1.50 mi617-3511-1120+2855675157
Finish13.11 mi1.11 mi585+32490+21113+7511429113

Segment Performance Analysis

10.5M→12M

0.0 - 2.0 mi

Top 13%
~flat
+5ft-3ft

Overall

855

Males

675

M25-29

157

2M→4M

2.0 - 4.0 mi

Top 10%
×4story building
+67ft-69ft

Overall

666

Males

554

M25-29

133

4M→6M

4.0 - 6.0 mi

Top 13%
×9story building
+123ft-9ft

Overall

826

Males

676

M25-29

163

6M→8M

6.0 - 8.0 mi

Top 23%
×12story building
+166ft-53ft

Overall

1495

Males

1151

M25-29

272

8M→9.6M

8.0 - 9.6 mi

Top 5%
×13story building
+68ft-193ft

Overall

299

Males

236

M25-29

56

9.6M→10M

9.6 - 10.0 mi

Top 8%
×2story building
+0ft-24ft

Overall

530

Males

426

M25-29

105

10M→10.5M

10.0 - 10.5 mi

Top 6%
×6story building
+1ft-73ft

Overall

395

Males

341

M25-29

88

10.5M→12M

10.5 - 12.0 mi

Top 13%
×21story building
+280ft-26ft

Overall

855

Males

675

M25-29

157

12M→Finish

12.0 - 13.1 mi

Top 8%
×7story building
+14ft-89ft

Overall

511

Males

429

M25-29

113

Passing Analysis

Category:
Athletes Passed
306*
Passed By
377
Net Change
-71
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 2M----#514
2M → 4M1783-66#514#580
4M → 6M1272-60#580#640
6M → 8M18175-157#640#797
8M → 9.6M1698+161#797#636
9.6M → 10M192+17#636#619
10M → 10.5M50+5#619#614
10.5M → 12M3336-3#614#617
12M → Finish33*1+32#617#585
TOTALS306*377-71

* Includes athletes who did not complete a segment (DNF/DNQ).

Passing Charts

Category:
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Passing Circle

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Position Flow

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Race Lanes

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Official Timing Data

The San Francisco Marathon

The San Francisco Marathon

Race Place Events

Race Place Events